diff --git a/_templates/languages.html b/_templates/languages.html
index 8fa84d8bd..357cbd6a2 100644
--- a/_templates/languages.html
+++ b/_templates/languages.html
@@ -12,7 +12,7 @@
   <option value="ru">Русский</option>
   <option value="ko">한국어</option>
   <option value="ja">日本語</option>
-  <option value="zh-CN">简体中文</option>
-  <option value="zh-TW">繁体中文</option>
+  <option value="zh-cn">简体中文</option>
+  <option value="zh-tw">繁体中文</option>
   <option value="ar">العربية</option>
 </select>