You would have to translate each and every file in the forum. Or, you could wait another week or so.
I found a translated Snitz forum here: http://www.elmar.nl/forum/ and contacted them. They are willing to provide their translated version for use by members (for free).
I'm just waiting for them to send me the zip-file, I'll upload that to the site here and provide a download link for it.
I have the Forum translate by my self in Portuguese Language... it tooks one week to translate the entire files... 4 days to found the other 2 to translate :(
Please (if you want) make the translated forum available for other users again. As long as we don't have an easy translateble forum there are a lot of people looking for a translated version. You can post a link to the forum here: http://forum.snitz.com/forum/link.asp?TOPIC_ID=5920