As a counterexample, when I open some lib's repo and see comments in code are non-english, I just close it and don't use the lib. Not because I'm a racist, mind you, but because it complicates trying to understand/modify it by unreasonable amount of time. When I'm working I have to deal with spec requirements in other languages too, which is also troublesome. I kinda agree with gp on this, things would be much, much simpler.