We already have a whole bunch of subtitles for Sintel (both on youtube and for the DVD). They come in the form of .srt files.
I have put most of the ones that people have sent to Ton since the movie was released on a little spot on my website.
If you want to help out, check them, improve them… you can download them there.
If you have a new or improved one, please post a link to the .srt file here, and I will double check and upload it to my spot as well.
If you can confirm that a language file is correct, please also post that here.
Dolf & the Durian team
PS: I forgot to mention… the names of the characters do not need translation!