I have CKEditor and Chinese Simplified plugin in my Zencart but the CKEditor was not showing for other language except for english. I have follow the advise from here, download the zh-cn.js from CKEditor and put in the editor/ckeditor/lang/zh-cn.js but still no luck.

I'm Using
Zencart 1.5.0
CKeditor from http://www.zen-cart.com/downloads.php?do=file&id=1098
Chinese Simplified Language Pack from http://www.zen-cart.com/downloads.php?do=file&id=251 - Encoding-UTF8

If anyone facing the same problem, can please share your solution.