Ask HN: Online Project Management with Document Editing

I'm looking for a online project management application for a small team (~10 people) which also can be used as a text editor.

Document editing is important because it is needed to editing motions and press releases in a team, which are currently send back and forth via email and it is hard to keep the text current.

One last thing, it must have a German localisation. Therefore Basecamp 3, even though it looks nice, can't be used.