I'm being honest about the suggestions channel on the discord. That's probably the best way to help. There are definitely things that could be improved, I've noticed them myself - things that are not incorrect, but clumsy in english, phrases that could be streamlined. As far as I understand they are written in english, because otherwise, Ocean wouldn't be trying to do a german translation still. The thing is that even if it's first written in english, the slang of english in Germany will still have different phrases to people in the US or the UK. Imagine writing the entire script in cockney slang, or californian idiom.