I create Translate Twitter Greasemonkey and Bookmarklet using Google AJAX language API.

http://chris4403.blogspot.com/2008/03/translate-twitter-greasemonkey-and.html

You can see various language in Twitter public timeline(http://twitter.com/public_timeline). If you use this tool, "translate!" links appear at every updates. Click the "translate" link, the translated word will be shown.

Thanks!

this is excellent, thanks for sharing!!