Hi Murat!
I just sent Gideon the URL of my translation. As I don't know, when he will add it to the list of translations, here you go: geekin.de/test/german.zip
Have fun with it,
Corinna
PS: I did not test the email-translations. If there's a problem, delete that file to default to english.
PPS: I translated only the content relevant for users, not the admin area.
