Its not about tolerance, its about acceptance.
Regardless, it shouldn't matter.
If Russians go around speaking russian, then that's fine.
The English and Americans go around speaking English.
If people with different languages want to play the game, they should be allowed to, and they should be allowed to speak their own language. If you don't like them doing so on your server, then remove them. If you don't like them doing so on their server, don't join their server.
Putting off international players is a stupid thing.
This game is interesting on a universal standard. The ability to enjoy building games or sandbox games is not something restricted to English speakers.
If the game goes big in other countries and people with other languages buy the game, it's still more money for badspot and Blockland. Just don't hang out with them if you dislike them or their language.