identified a problem in index.html, but not sure why and how to avoid.

_config.yml

@@ -20,5 +20,5 @@ github:
 # i18n
 languages:       ["en", "zh-CN"]
 lang_name:
-  en:    En
+  en: En
   zh-CN: 汉

_i18n/en.yml

@@ -1,3 +1,9 @@
 global:
   title:       "Shixing Wang"
   description: "Shixing Wang's personal website"
+titles:
+  index:    Shixing Wang
+  home:     Home
+  research: Research
+  courses:  Courses
+  resume:   Resumé

_i18n/en/home.html

@@ -0,0 +1,32 @@
+<div class="posts">
+    {% for post in paginator.posts %}
+    <div class="post">
+      <h1 class="post-title">
+        <a href="{{ post.url }}">
+          {{ post.title }}
+        </a>
+      </h1>
+
+      <span class="post-date">{{ post.date | date_to_string }}</span>
+
+      {{ post.content }}
+    </div>
+    {% endfor %}
+  </div>
+
+  <div class="pagination">
+    {% if paginator.next_page %}
+      <a class="pagination-item older" href="{{ site.baseurl }}page{{paginator.next_page}}">Older</a>
+    {% else %}
+      <span class="pagination-item older">Older</span>
+    {% endif %}
+    {% if paginator.previous_page %}
+      {% if paginator.page == 2 %}
+        <a class="pagination-item newer" href="{{ site.baseurl }}">Newer</a>
+      {% else %}
+        <a class="pagination-item newer" href="{{ site.baseurl }}page{{paginator.previous_page}}">Newer</a>
+      {% endif %}
+    {% else %}
+      <span class="pagination-item newer">Newer</span>
+    {% endif %}
+  </div>

_i18n/zh-CN.yml

@@ -1,3 +1,9 @@
 global:
   title:       "王世兴"
-  description: "王世兴的个人网站"
+  description: "王世兴的个人网站"
+titles:
+  index:    王世兴
+  home:     主页
+  research: 研究
+  courses:  课程
+  resume:   简历

_includes/sidebar.html

@@ -18,14 +18,13 @@ <h1>
         `layout: page` in the front-matter. See readme for usage.
       {% endcomment %}
 
-      {% assign pages_list = site.pages %}
-      {% for node in pages_list %}
-        {% if node.title != null %}
-          {% if node.layout == "page" %}
-            <a class="sidebar-nav-item{% if page.url == node.url %} active{% endif %}" href="{{ node.url }}">{{ node.title }}</a>
-          {% endif %}
-        {% endif %}
-      {% endfor %}
+      {% comment %}
+      OK there's problem in this block
+      <a class="sidebar-nav-item{% capture url %}{% t {{ titles.home }} %}{% endcapture %}{% if page.url == url %} active{% endif %}" href="{% tl home %}"   >{% t {{ titles.home }} %}</a>
+      <a class="sidebar-nav-item{% capture url %}{% t {{ titles.reserch }} %}{% endcapture %}{% if page.url == url %} active{% endif %}" href="{% tl reserch %}">{% t {{ titles.reserch }} %}</a>
+      <a class="sidebar-nav-item{% capture url %}{% t {{ titles.courses }} %}{% endcapture %}{% if page.url == url %} active{% endif %}" href="{% tl courses %}">{% t {{ titles.courses }} %}</a>
+      <a class="sidebar-nav-item{% capture url %}{% t {{ titles.resume }} %}{% endcapture %}{% if page.url == url %} active{% endif %}" href="{% tl resume %}" >{% t {{ titles.resume }} %}</a>
+      {% endcomment %}
 
       <a class="sidebar-nav-item" href="{{ site.github.repo }}">GitHub project</a>
     </nav>

courses.md

@@ -1,3 +1,10 @@
 ---
 layout: page
----
+title: titles.courses
+
+namespace: courses
+permalink: /courses
+permalink_zh-CN: /courses
+---
+
+{% tf courses.html %}

home.html

@@ -1,37 +1,10 @@
 ---
-layout: default
-title: Home
----
-
-<div class="posts">
-  {% for post in paginator.posts %}
-  <div class="post">
-    <h1 class="post-title">
-      <a href="{{ post.url }}">
-        {{ post.title }}
-      </a>
-    </h1>
+layout: page
+title: titles.home
 
-    <span class="post-date">{{ post.date | date_to_string }}</span>
-
-    {{ post.content }}
-  </div>
-  {% endfor %}
-</div>
+namespace: home
+permalink: /home
+permalink_zh-CN: /home
+---
 
-<div class="pagination">
-  {% if paginator.next_page %}
-    <a class="pagination-item older" href="{{ site.baseurl }}page{{paginator.next_page}}">Older</a>
-  {% else %}
-    <span class="pagination-item older">Older</span>
-  {% endif %}
-  {% if paginator.previous_page %}
-    {% if paginator.page == 2 %}
-      <a class="pagination-item newer" href="{{ site.baseurl }}">Newer</a>
-    {% else %}
-      <a class="pagination-item newer" href="{{ site.baseurl }}page{{paginator.previous_page}}">Newer</a>
-    {% endif %}
-  {% else %}
-    <span class="pagination-item newer">Newer</span>
-  {% endif %}
-</div>
+{% tf home.html %}

index.html

@@ -2,6 +2,8 @@
 layout: null
 ---
 
+{% comment %}<!-- No need for {% tf index.html %} -->{% endcomment %}
+
 <!DOCTYPE html>
 <html lang="en-us">
   {% include head.html %}

research.md

@@ -1,3 +1,10 @@
 ---
 layout: page
----
+title: titles.research
+
+namespace: research
+permalink: /research
+permalink_zh-CN: /research
+---
+
+{% tf research.html %}

resume.md

@@ -1,30 +1,10 @@
 ---
 layout: page
-title: Resume
----
-
-<p class="message">
-  Hey there! This page is included as an example. Feel free to customize it for your own use upon downloading. Carry on!
-</p>
-
-In the novel, *The Strange Case of Dr. Jeykll and Mr. Hyde*, Mr. Poole is Dr. Jekyll's virtuous and loyal butler. Similarly, Poole is an upstanding and effective butler that helps you build Jekyll themes. It's made by [@mdo](https://twitter.com/mdo).
-
-There are currently two themes built on Poole:
-
-* [Hyde](http://hyde.getpoole.com)
-* [Lanyon](http://lanyon.getpoole.com)
+title: titles.resume
 
-Learn more and contribute on [GitHub](https://github.com/poole).
-
-## Setup
-
-Some fun facts about the setup of this project include:
-
-* Built for [Jekyll](http://jekyllrb.com)
-* Developed on GitHub and hosted for free on [GitHub Pages](https://pages.github.com)
-* Coded with [Sublime Text 2](http://sublimetext.com), an amazing code editor
-* Designed and developed while listening to music like [Blood Bros Trilogy](https://soundcloud.com/maddecent/sets/blood-bros-series)
-
-Have questions or suggestions? Feel free to [open an issue on GitHub](https://github.com/poole/issues/new) or [ask me on Twitter](https://twitter.com/mdo).
+namespace: resume
+permalink: /resume
+permalink_zh-CN: /resume
+---
 
-Thanks for reading!
+{% tf resume.html %}