I moved to France in 2007 and didn't speak the language, to do a math degree. It was fine. The first two years were rough, but after that I had no problems, and

I moved to France in 2007 and didn't speak the language, to do a math degree. It was fine. The first two years were rough, but after that I had no problems, and by the time I left in 2013 people regularly thought I was a native speaker. The math/tech background helped a lot in the beginning. The texts there are more structured than normal, so you can get functional quickly without being conversational. Moving there is the best thing that happened to me. Don't let the language discourage you from going anywhere. You'll struggle, and overcome.