I have moderated this topic and deleted posts because they were linking to unsupported methods that allow players to change the game data. This makes the overall experience of the game untrustworthy. "Hacking" the German game version into English is by no means supported or even advisable.
The problem the first poster ran into, is indeed caused by changing the text in the German game into English. The German release does not support English. To us, problems that occur because you've tried to change the game's language are non-issues, because the German version "as is" works. If you start tinkering with it, you're on your own.