IT people in Berlin speak very good English. Most of the "mistakes" they make are common German-to-English mistakes that you will automatically correct in your

IT people in Berlin speak very good English. Most of the "mistakes" they make are common German-to-English mistakes that you will automatically correct in your head after hearing them a few times. The question is whether the work language is English or not. If people find it easier to discuss problems in their native tongue, then that is where you will miss out. And these discussions may be some of the harder conversations to follow.