Quote from e-freakalthough games are being developed in english in germany as well, and as e.g. crytek shows you can easily migrate people from all around the globe.
It's the one case where it works, it's little known particularly in a country where it's exactly the opposite (you're expected to have perfectly fluent English to work in the US) and besides all that, people still face real life in a foreign nation and language when they're not working. Not many can surpass these fears, and Europeans due to geographical reasons are much more prone to being exposed to this early on, therefore to accepting these challenges.