We'll use www.crowdin.com
How far can you edit translations? Are they all text or are there variables in some strings?
Oh neat, maybe I'll help with a Swedish translation if that would be useful.
Will there be ways to test translations beforehand? What about scaling? There'll probably be cases where a translation might not fit into the same space where English would.
If you need people for Swedish or Finnish translation i'll happilly volounteer
Happy to help with Polish as well as German. I'm a native speaker of both.