Well, I haven't read every single post, but I think I kind of understand Raistlin.
I like international servers and being able to play with people from all over the world

But seriously, English is an universal language many people from different countries speak, and that's a good thing, because it's pretty much the only way to get to talk to people who's native language is NOT english.

My native language isn't English either, so what? Do I walk around in Eorzea, only talking in my language, make it obvious I'm talking bad behind the backs of some people and laugh at them because they can't understand me?
Do I make fun of them, ignore them, stop ANYTHING related to them, even if it was just a trade or anything where the language barrier is not really a problem, just because I found out they speak a different language?
(I experienced all of this already, with people from all kinds of countries)
This is not about Japanese, it's about people from any country: I think in such an international world we live in today, it's rather rude not even trying to learn a language you can communicate in with others.

Edit: Oh, and I know there are many faults in what I wrote, I don't expect anyone to be perfect at English, but refusing to try it is really bad, just my opinion.