I have the latest stable release of Rockbox on my Sansa Fuze v2, that is version 3.7.1.
I'm sorry, SVN revision?
Anyway, it's not really an issue if the translation will be properly packaged in the next version of Rockbox, that is the translated strings will be in the right place. I can wait for the "official release" of the translation, I just hoped that I could use the translation immediately.