I agree that is easier when people speak english. But I disagree with assumption that people are speaking their native language with intent to annoy others and that everyone understands english language good enough to be able to write it without help of google translator. They simply don't.
Take Ivani4 or Artem, for example. I bet they couldn't understand a single letter of alphabet when they started playing this mod. Now, you can see them writing sorry from time to time, using english alphabet. That just shows they aren't ignorant people, they took time to learn foreign language to be able to communicate better with other players in an online game. This is a game after all, no one should be forced to learn anything. It's about having fun, remember?