Optimize language switching in navigation bar

i18n/en.toml

 # home page
+[main_home_logo]
+other = "/en"
+
 [main_partner_title]
 other = "Members"
 

i18n/zh.toml

 # home page
+[main_home_logo]
+other = "/zh"
+
 [main_partner_title]
 other = "社区会员"
 

themes/project/layouts/partials/nav.html

 <!--h5 -->
 <div class="isH5 isPad nav_table">
-  <a class="navbar-brand home" href="{{ .Site.BaseURL }}">
+  <a class="navbar-brand home" href="{{ i18n "main_home_logo" }}">
     <img src="{{ .Site.BaseURL }}{{ .Site.Params.logo }}" alt="{{ .Title }} logo" class="hidden-xs hidden-sm">
     <img src="{{ .Site.BaseURL }}{{ .Site.Params.logo_small }}" alt="{{ .Title }} logo" class="visible-xs visible-sm">
     <span class="sr-only">{{ .Title }} - {{ i18n "navHome" }}</span>
@@ -62,7 +62,7 @@
 
     <div class="container">
         <div class="navbar-header">
-        <a class="navbar-brand home" href="{{ .Site.BaseURL }}">
+        <a class="navbar-brand home" href="{{ i18n "main_home_logo" }}">
             <img src="{{ .Site.BaseURL }}{{ .Site.Params.logo }}" alt="{{ .Title }} logo" class="hidden-xs hidden-sm">
             <img src="{{ .Site.BaseURL }}{{ .Site.Params.logo_small }}" alt="{{ .Title }} logo"
             class="visible-xs visible-sm">
@@ -77,6 +77,8 @@
         </div>
         </div>
         <!--/.navbar-header -->
+        {{$curURL:= .RelPermalink}}
+        {{$curDir:= substr $curURL 4}}
         <div class="navbar-collapse collapse" id="navigation">
         <ul class="nav navbar-nav navbar-right">
             {{ $current := . }}
@@ -89,8 +91,7 @@
             {{ end }}
             {{ end }}
             {{ if ne .Identifier "lang" }}
-          <li
-            class="dropdown{{ if eq $current.RelPermalink .URL | or $isChildren | or (eq (trim $current.RelPermalink "/") $topLevel) | or (eq $current.Type .Identifier) | or (eq $current.Type $topLevel) | or (and (eq (default (trim .URL "/") .Identifier) "blog") (in (slice "taxonomy" "taxonomyTerm") $current.Kind)) }} active{{ end }}">
+            <li>
             {{ if .HasChildren }}
             <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true"
               aria-expanded="false">{{ .Name }} <span class="caret"></span></a>
@@ -109,9 +110,33 @@
             </li>
             {{ end }}
             {{ if eq .Identifier "lang" }}
-          <li style="width:67px;text-align: center;"
-          class=" dropdown{{ if eq $current.RelPermalink .URL | or $isChildren | or (eq (trim $current.RelPermalink "/") $topLevel) | or (eq $current.Type .Identifier) | or (eq $current.Type $topLevel) | or (and (eq (default (trim .URL "/") .Identifier) "blog") (in (slice "taxonomy" "taxonomyTerm") $current.Kind)) }} active{{ end }}">
-          <a href="{{ .URL }}">{{ .Name }}</a>  
+            {{$newLan := .URL}}
+            {{$newPath := (print $newLan "/" $curDir)}}
+            {{$splitPath := split $curDir "/"}}
+            {{$menu := first 1 $splitPath }}
+            {{$docMenu := first 2 $splitPath }}
+            {{$finalMenu := index $menu 0}}
+            {{$finalDocMenu := index $docMenu 1}}
+
+            {{if or (eq $finalMenu "blog") (eq $finalMenu "tags") (eq $finalMenu "archives")}}
+            {{$newPath = (print $newLan "/blog.html")}}
+            {{end}}
+
+            {{if eq $finalMenu "events"}}
+            {{$newPath = (print $newLan "/events.html")}}
+            {{end}}
+
+            {{if eq $finalDocMenu "20.03_LTS"}}
+            {{$newPath = (print $newLan "/docs/20.03_LTS/docs/Quickstart/quick-start.html")}}
+            {{end}}
+
+            {{if eq $finalDocMenu "1.0_Base"}}
+            {{$newPath = (print $newLan "/docs/1.0_Base/docs/Releasenotes/release_notes.html")}}
+            {{end}}
+
+
+        <li style="width:67px;text-align: center;">
+            <a href="{{ $newPath }}">{{ .Name }}</a>  
             </li>
             {{ end }}
             {{ end }}
@@ -122,9 +147,7 @@
             <li><a href="https://gitee.com/src-openeuler">{{i18n "main_nav_packageSources"}}</a></li>
             </ul>
         </li>    
-            
         </li>   
-          
         </ul>
         </div>
         <!--/.nav-collapse -->