diff --git a/en/adblock/index.html b/en/adblock/index.html
index 0c9ba860..c6b2bae6 100644
--- a/en/adblock/index.html
+++ b/en/adblock/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>AD blocking</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/adblock_domain/index.html b/en/adblock_domain/index.html
index 503b186a..39990bbc 100644
--- a/en/adblock_domain/index.html
+++ b/en/adblock_domain/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Blocking domain trees</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/bookmarklet/index.html b/en/bookmarklet/index.html
index 7a770167..f0212bf7 100644
--- a/en/bookmarklet/index.html
+++ b/en/bookmarklet/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Bookmarklets</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/changelog/index.html b/en/changelog/index.html
index 1ea9faed..3e3336d4 100644
--- a/en/changelog/index.html
+++ b/en/changelog/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Change log</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/filecap/index.html b/en/filecap/index.html
index 85b174e3..dee50fa3 100644
--- a/en/filecap/index.html
+++ b/en/filecap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Custom file handling</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/filenames/index.html b/en/filenames/index.html
index a0f821b3..fe0b4b25 100644
--- a/en/filenames/index.html
+++ b/en/filenames/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Configuration folders/files</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/globalcss/index.html b/en/globalcss/index.html
index 136cebce..1c5f64cf 100644
--- a/en/globalcss/index.html
+++ b/en/globalcss/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>CSS样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/icons/index.html b/en/icons/index.html
index 0e477586..50ec65b1 100644
--- a/en/icons/index.html
+++ b/en/icons/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Toolbar customization</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/index.html b/en/index.html
index a4c50f20..94532b43 100644
--- a/en/index.html
+++ b/en/index.html
@@ -8,19 +8,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title></title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
@@ -29,11 +43,6 @@
 
 <ul class="posts">
   
-  <li class="post">
-    <a href="../zh/index.html">
-      <span>中文</span>
-    </a>
-  </li>
   <li class="post">
     <a href="https://s1.asytech.cn/s/tQrgT5kBRg8Trry">
       <span>Download the uweb browser</span>
diff --git a/en/links/index.html b/en/links/index.html
index 960413b9..2c479cf8 100644
--- a/en/links/index.html
+++ b/en/links/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Links</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/longclick/index.html b/en/longclick/index.html
index 6ccdff0b..0e44f3ab 100644
--- a/en/longclick/index.html
+++ b/en/longclick/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Long pressed link menu</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/pccopy/index.html b/en/pccopy/index.html
index 60f76e40..510f81bd 100644
--- a/en/pccopy/index.html
+++ b/en/pccopy/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Text selection</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/sitejs/index.html b/en/sitejs/index.html
index 7cc20213..6ca7d820 100644
--- a/en/sitejs/index.html
+++ b/en/sitejs/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Javascript and CSS for domains</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/sitemap/index.html b/en/sitemap/index.html
index ae3076a5..95a89517 100644
--- a/en/sitemap/index.html
+++ b/en/sitemap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Site map</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/adblock/index.html b/en/tags/adblock/index.html
index 00b9b20c..c70060d8 100644
--- a/en/tags/adblock/index.html
+++ b/en/tags/adblock/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>adblock</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/clipboard/index.html b/en/tags/clipboard/index.html
index 09ec91f7..3f4fc571 100644
--- a/en/tags/clipboard/index.html
+++ b/en/tags/clipboard/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>clipboard</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/css/index.html b/en/tags/css/index.html
index c51d86da..56ec6ca6 100644
--- a/en/tags/css/index.html
+++ b/en/tags/css/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>css</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/curl/index.html b/en/tags/curl/index.html
index e6058b58..8ce01c1f 100644
--- a/en/tags/curl/index.html
+++ b/en/tags/curl/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>curl</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/javascript/index.html b/en/tags/javascript/index.html
index 2ec77f87..dba4438a 100644
--- a/en/tags/javascript/index.html
+++ b/en/tags/javascript/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>javascript</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/pc/index.html b/en/tags/pc/index.html
index dff6c7df..3713fde6 100644
--- a/en/tags/pc/index.html
+++ b/en/tags/pc/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>PC</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/ssh/index.html b/en/tags/ssh/index.html
index 8261db8b..543f2072 100644
--- a/en/tags/ssh/index.html
+++ b/en/tags/ssh/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>ssh</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/termux/index.html b/en/tags/termux/index.html
index 6bbfbf12..9aaae38f 100644
--- a/en/tags/termux/index.html
+++ b/en/tags/termux/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>termux</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/en/tags/windows/index.html b/en/tags/windows/index.html
index 3ae96e34..829d92c5 100644
--- a/en/tags/windows/index.html
+++ b/en/tags/windows/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Windows</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('zh')">简体中文</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock/index.html b/zh/adblock/index.html
index 1b9c4e9a..b58cc914 100644
--- a/zh/adblock/index.html
+++ b/zh/adblock/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>信息隐藏技术总览</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock_css/index.html b/zh/adblock_css/index.html
index 082d1cea..37b204a5 100644
--- a/zh/adblock_css/index.html
+++ b/zh/adblock_css/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用用户自定义样式屏蔽不良信息</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/adblock_domain/index.html b/zh/adblock_domain/index.html
index aef536b2..5ba52392 100644
--- a/zh/adblock_domain/index.html
+++ b/zh/adblock_domain/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>绝杀完整域名树</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/androidtv/index.html b/zh/androidtv/index.html
index 423dcf33..7425616e 100644
--- a/zh/androidtv/index.html
+++ b/zh/androidtv/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Android TV</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bc/index.html b/zh/bc/index.html
index e84bb516..b828b308 100644
--- a/zh/bc/index.html
+++ b/zh/bc/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>超级计算器(bc)</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bookmark/index.html b/zh/bookmark/index.html
index 3276c44e..95d75ea9 100644
--- a/zh/bookmark/index.html
+++ b/zh/bookmark/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>常用书签</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/bookmarklet/index.html b/zh/bookmarklet/index.html
index f97f67c6..3d6134d0 100644
--- a/zh/bookmarklet/index.html
+++ b/zh/bookmarklet/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>小书签</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/cmd/index.html b/zh/cmd/index.html
index 4ba9b790..ab7ed446 100644
--- a/zh/cmd/index.html
+++ b/zh/cmd/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>一键执行任意预定义命令（附手机PC剪贴板互通）</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filecap/index.html b/zh/filecap/index.html
index aa1f8dac..894539a3 100644
--- a/zh/filecap/index.html
+++ b/zh/filecap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用文件预处理预览/查看/播放一切可下载资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filemanager/index.html b/zh/filemanager/index.html
index 4c5f106c..55048e89 100644
--- a/zh/filemanager/index.html
+++ b/zh/filemanager/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>文件管理器及文件挑选并批量处理</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/filenames/index.html b/zh/filenames/index.html
index 7aebd8ea..f1ed7eda 100644
--- a/zh/filenames/index.html
+++ b/zh/filenames/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>超微浏览器配置文件列表</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/gesture/index.html b/zh/gesture/index.html
index 09aa4a47..9375cd4a 100644
--- a/zh/gesture/index.html
+++ b/zh/gesture/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>手势</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/globalcss/index.html b/zh/globalcss/index.html
index 1e3d25a0..6fbd4058 100644
--- a/zh/globalcss/index.html
+++ b/zh/globalcss/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>CSS样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/gnuplot/index.html b/zh/gnuplot/index.html
index b7debaeb..0da2e2b0 100644
--- a/zh/gnuplot/index.html
+++ b/zh/gnuplot/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用浏览器地址栏对函数作图</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/hosts/index.html b/zh/hosts/index.html
index 5c92699e..0e7c0132 100644
--- a/zh/hosts/index.html
+++ b/zh/hosts/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>加速访问国外网站</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/html5/index.html b/zh/html5/index.html
index d21f4ab9..774217ea 100644
--- a/zh/html5/index.html
+++ b/zh/html5/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>html5应用</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/icons/index.html b/zh/icons/index.html
index 15180ce0..b6e7f39d 100644
--- a/zh/icons/index.html
+++ b/zh/icons/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>工具栏定制</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/index.html b/zh/index.html
index 97f8802b..d346bea1 100644
--- a/zh/index.html
+++ b/zh/index.html
@@ -8,19 +8,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title></title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
@@ -29,11 +43,6 @@
 
 <ul class="posts">
   
-  <li class="post">
-    <a href="../en/index.html">
-      <span>English</span>
-    </a>
-  </li>
   <li class="post">
     <a href="searchurl/donate.html">
       <span>请一杯咖啡，提一个要求</span>
diff --git a/zh/links/index.html b/zh/links/index.html
index 871e87b2..6e629732 100644
--- a/zh/links/index.html
+++ b/zh/links/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>常用链接</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/loadbt/index.html b/zh/loadbt/index.html
index 7cabf803..e9376783 100644
--- a/zh/loadbt/index.html
+++ b/zh/loadbt/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>离线下载</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/logcat/index.html b/zh/logcat/index.html
index e0cc2666..6f549323 100644
--- a/zh/logcat/index.html
+++ b/zh/logcat/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>安卓系统出错诊断</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/longclick/index.html b/zh/longclick/index.html
index 42dcbc47..b4203d97 100644
--- a/zh/longclick/index.html
+++ b/zh/longclick/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>长按链接弹出菜单</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/multiaccount/index.html b/zh/multiaccount/index.html
index 6935058a..e73edab1 100644
--- a/zh/multiaccount/index.html
+++ b/zh/multiaccount/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>利用多账号登录获取资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/offlinecache/index.html b/zh/offlinecache/index.html
index f6e7f8da..21c2e039 100644
--- a/zh/offlinecache/index.html
+++ b/zh/offlinecache/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>装载网站离线资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/pccopy/index.html b/zh/pccopy/index.html
index 02d7fd11..7e7ee64d 100644
--- a/zh/pccopy/index.html
+++ b/zh/pccopy/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>操作选中（富）文本／元素</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/pcdown/index.html b/zh/pcdown/index.html
index 5f80ce30..64a722f3 100644
--- a/zh/pcdown/index.html
+++ b/zh/pcdown/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>浏览器一键控制台式机/服务器下载资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/redirect/index.html b/zh/redirect/index.html
index 24ee9956..fdb66ff2 100644
--- a/zh/redirect/index.html
+++ b/zh/redirect/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>重定向国外网址至国内镜像（附编辑本地文件）</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/searchcat/index.html b/zh/searchcat/index.html
index cec2db15..5bf1e4fe 100644
--- a/zh/searchcat/index.html
+++ b/zh/searchcat/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>分类多引擎搜索</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/sitejs/index.html b/zh/sitejs/index.html
index 23499112..826357ff 100644
--- a/zh/sitejs/index.html
+++ b/zh/sitejs/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>特定网址用户脚本及样式</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/sitemap/index.html b/zh/sitemap/index.html
index 1cc24a05..2c3390d0 100644
--- a/zh/sitemap/index.html
+++ b/zh/sitemap/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>技巧网站导航</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/css/index.html b/zh/tags/css/index.html
index 1f889d30..870e70ca 100644
--- a/zh/tags/css/index.html
+++ b/zh/tags/css/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>css</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/curl/index.html b/zh/tags/curl/index.html
index 76dc3b56..fc8d727d 100644
--- a/zh/tags/curl/index.html
+++ b/zh/tags/curl/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>curl</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/javascript/index.html b/zh/tags/javascript/index.html
index 8feed891..2b317ced 100644
--- a/zh/tags/javascript/index.html
+++ b/zh/tags/javascript/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>javascript</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/pc/index.html b/zh/tags/pc/index.html
index adddc347..bc951104 100644
--- a/zh/tags/pc/index.html
+++ b/zh/tags/pc/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>PC</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/ssh/index.html b/zh/tags/ssh/index.html
index 2b6c8cbe..1aabe8f5 100644
--- a/zh/tags/ssh/index.html
+++ b/zh/tags/ssh/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>ssh</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/tdict/index.html b/zh/tags/tdict/index.html
index 9aacab76..c940a8da 100644
--- a/zh/tags/tdict/index.html
+++ b/zh/tags/tdict/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>tdict</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/termux/index.html b/zh/tags/termux/index.html
index 69bd2445..844e0e37 100644
--- a/zh/tags/termux/index.html
+++ b/zh/tags/termux/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>termux</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/tools/index.html b/zh/tags/tools/index.html
index 65754f8e..158d8bf9 100644
--- a/zh/tags/tools/index.html
+++ b/zh/tags/tools/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>tools</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/windows/index.html b/zh/tags/windows/index.html
index 793f8e0e..c7b182ff 100644
--- a/zh/tags/windows/index.html
+++ b/zh/tags/windows/index.html
@@ -7,19 +7,33 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>Windows</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
+        
+          <a class="logo" href="javascript:void(0)" onclick="return nav2Lang('en')">English</a>
+        
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/下载/index.html b/zh/tags/下载/index.html
index 0d139e2c..14dbd355 100644
--- a/zh/tags/下载/index.html
+++ b/zh/tags/下载/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>下载</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/不良信息屏蔽/index.html b/zh/tags/不良信息屏蔽/index.html
index 07309a36..77a23903 100644
--- a/zh/tags/不良信息屏蔽/index.html
+++ b/zh/tags/不良信息屏蔽/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>不良信息屏蔽</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/剪贴板/index.html b/zh/tags/剪贴板/index.html
index 462c05e9..e73d89dd 100644
--- a/zh/tags/剪贴板/index.html
+++ b/zh/tags/剪贴板/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>剪贴板</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/国外网址/index.html b/zh/tags/国外网址/index.html
index 14150af6..73db36d2 100644
--- a/zh/tags/国外网址/index.html
+++ b/zh/tags/国外网址/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>国外网址</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/搜索/index.html b/zh/tags/搜索/index.html
index c4bcb6a7..f7e26762 100644
--- a/zh/tags/搜索/index.html
+++ b/zh/tags/搜索/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>搜索</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/电视/index.html b/zh/tags/电视/index.html
index c3b7d6a1..829663a1 100644
--- a/zh/tags/电视/index.html
+++ b/zh/tags/电视/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>电视</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/离线/index.html b/zh/tags/离线/index.html
index d6507f40..eef42a77 100644
--- a/zh/tags/离线/index.html
+++ b/zh/tags/离线/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>离线</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/网盘/index.html b/zh/tags/网盘/index.html
index 535c4d1d..a5617af2 100644
--- a/zh/tags/网盘/index.html
+++ b/zh/tags/网盘/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>网盘</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/资源/index.html b/zh/tags/资源/index.html
index 0a1b7480..5d92fe17 100644
--- a/zh/tags/资源/index.html
+++ b/zh/tags/资源/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>资源</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tags/重定向/index.html b/zh/tags/重定向/index.html
index 67ae836e..fbed70a4 100644
--- a/zh/tags/重定向/index.html
+++ b/zh/tags/重定向/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>重定向</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tcron/index.html b/zh/tcron/index.html
index 522aea68..1bf886b3 100644
--- a/zh/tcron/index.html
+++ b/zh/tcron/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>定时脚本</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tips/index.html b/zh/tips/index.html
index cc25aa46..8ca071e1 100644
--- a/zh/tips/index.html
+++ b/zh/tips/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>小技巧</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tools/index.html b/zh/tools/index.html
index 339ee913..9144919b 100644
--- a/zh/tools/index.html
+++ b/zh/tools/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>工具汇总</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/tvlive/index.html b/zh/tvlive/index.html
index 14330b29..36b5c712 100644
--- a/zh/tvlive/index.html
+++ b/zh/tvlive/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>电视直播</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/urls/index.html b/zh/urls/index.html
index 578c6599..6b45ffd0 100644
--- a/zh/urls/index.html
+++ b/zh/urls/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>便利链接</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
diff --git a/zh/video/index.html b/zh/video/index.html
index 253615b2..b0d6e2bd 100644
--- a/zh/video/index.html
+++ b/zh/video/index.html
@@ -7,19 +7,29 @@
     <link rel="stylesheet" href="/uwebzh/style.css" type="text/css" />
     <title>视频播放小窍门</title>
     <script type="text/javascript">
-      function nav2(page){
+      function findLang(){
         let href = location.href;
         for(let i=href.length-1;i>0;i--){
           if('/'==href.charAt(i) && '/'==href.charAt(i-3))
-            location.href = href.substring(0,i+1)+page;
+            return i;
         }
-        return false;
+        return 0;
+      }
+      function nav2(page){
+        let i = findLang();
+        location.href = location.href.substring(0,i+1)+page;
+      }
+      function nav2Lang(lang){
+        let i = findLang();
+        let href = location.href;
+        location.href = location.href.substring(0,i-2)+lang+location.href.substring(i);
       }
     </script>
   </head>
   <body>
     <header class='header'>
       <a class="logo" href="javascript:void(0)" onclick="return nav2('index.html')">Home</a> <a class="logo" href="javascript:void(0)" onclick="return nav2('tags/index.html')">Tags</a>
+      
       <nav>
       </nav>
     </header>
