see #12: support english website

website/themes/moderncpp/layout/partials/sidebar.ejs

@@ -1,11 +1,28 @@
 <div class="sidebar">
   <div class="sidebar-inner">
     <ul class="main-menu">
-      <%- partial('partials/main_menu', { context: 'sidebar' }) %>
+      <% if (page.type == 'book-en-us') { %>
+        <%- partial('partials/main_menu_en', { context: 'nav' }) %>
+      <% } else {%>
+        <%- partial('partials/main_menu', { context: 'nav' }) %>
+      <% } %>
     </ul>
     <div class="list">
       <h2>
-        <%-
+        <% if (page.type == 'book-en-us') { %>
+          <%-
+          type === 'exercises'
+              ? 'Exercises'
+              : type === 'book-zh-cn'
+              ? 'Main'
+              : type === 'answers'
+                  ? 'Reference Answers'
+                  : type === 'about'
+                  ? 'About'
+                  : (type.charAt(0).toUpperCase() + type.slice(1)) 
+          %>
+        <% } else {%>
+          <%-
           type === 'exercises'
             ? '习题'
             : type === 'book-zh-cn'
@@ -15,7 +32,8 @@
                 : type === 'about'
                   ? '关于'
                   : (type.charAt(0).toUpperCase() + type.slice(1)) 
-        %>
+          %>
+        <% } %>
       </h2>
       <%- partial('partials/toc', { type: type }) %>
     </div>