In the course of the next week, I expect to have three software applications for Mac OS X available: Annoture, Timeature, and a yet-to-be released enhancement for Apple Mail.
I’ve gotten help localizing my apps into French and German. What other languages are in typical OS X apps? Japanese is definitely one, any others? I’ll roll these languages in the next update of the app.
tow.com 
Hey,
I was localization coordinator at my last company and we would do:
Japanese, German, French, Italian, and Spanish. We were looking into Chinese. The cool thing about OSX is how easy it is using AppleGlot and you don’t have to create completely separate Apps like you do on Window$. You just drop in the language files and *poof* you’re good to go.