marketpress german

I would need help in translating marketpress into german. i already got myself poedit and had a look at the default.po file.

My questions:
1) Is there a existing german file i can use?
2) If not, how do i start producing one? i need step by step guidance with this.
3) how to tell marketpress to use the newly generated german file?

Thanks a lot for your help -
i am really totally new to this topic.