Get this alot man....don't worry...Minecraft has been very screwy since 1.3.1 . Just come back in around 15 minutes, it should be good.
My brother had that come up yesterday for him too! Just a glitch, me thinks. Nothing to do with languages. You just wait on that screen for 30-60secs and it'll change, then you can login again. Hope I helped, ~Maddy~