let page model support i18n

app/views/admin/pages/_form.html.erb

@@ -9,8 +9,13 @@
 </p>
 
 <p>
-<%= f.label :content, "Content" %>
-<%= f.text_area :content, :size => '100x30' %>
+<%= f.label "content_en", "Content (en)" %>
+<%= f.text_area "content_en", :size => '100x30' %>
+</p>
+
+<p>
+<%= f.label "content_zh_tw", "Content (zh_tw)" %>
+<%= f.text_area "content_zh_tw", :size => '100x30' %>
 </p>
 
 <p>