Last night I was playinh Aeylwin Mellie, Sun Elf Wizard, and each time I begin I began typed anything beginning with a bracket (e.g. "[nods.]") it would make me say something in elvish afterwards.
I know placing a bracket at the beginning of a string queues the languages for DMFI tools (No idea if EFU uses them. I guess if it did languages have likely been disabled), but maybe somehow this was turned on?
We don't got any languages. I'd recommend checking your own overrides or something else if you have such happening.
That's actually incorrect, as seen here some years ago, the last time I saw it come up actually:
http://www.efupw.com/forums/showthread.php?t=33773&highlight=languages
It's nothing to do with his client overrides and is in game currently (just not truly implemented and thus rarely an issue)
This was the result of a misclicked DM tool which temporarily enabled languages within that specific area, as far as I can tell.
If it recurs, let us know but it shouldn't be a problem anymore.