The point is, there should be fluent English people (maybe players like my self) that can prevent the chat from going out of control. There are always going to be immature players, you can see it in the forums (merc shit needs to go) and its detrimental to the game and will cause players to leave
what kind of insulting did you get? i guess GM cannot address it since they don't know itself.
It should be better if you can specific it to improve this game.