Thread:Talk:MediaWiki/How to add a wiki language toolbar to link two different mediawiki?

I install two wikis from the same source code.

http://en.bdmv.info/snowiki/Main_Page

http://zh.bdmv.info/snowiki/%E9%A6%96%E9%A0%81

If I want to add a toolbar like wikipedia to link the items from each wiki, how should I do?

http://blessing.bdmv.info/temp/wiki_language.png

please help me,thanks