Have you thought of making an alt on our server to get a good idea first hand? If this isn't possible when you try, try again at a later hour (say 9pm or onwards GMT+0) when the server begins to get quieter, given we're an EU server.

Moogle has a large range of players who aren't English, but I'd say it's around half-half possibly. Considering we're one of the busiest servers in the game, you have to think how many people are actually playing on our server at the busiest hours.