I wanted write something like "learn english m***kers", but I will not. Althougth I still think that's it. People who wants to play MMORPG games has to have at least basic knowleadge of international language :)
As someone already suggested I think +2 Con for Human is just pointless. Humans as we know from DnD are versatile, quick to be good at almost anything, but never be the best at it. For that I would see like +1 to a few stats more in place or let player choose +2 bonus...