English (and the history and development of several words)
Some:
Arabic (speach)
French
German
Russian
Greek (can read it better than speak it. Finally found a use for studying astrophysics at uni!)
American
Spanish
Had a duch friend at uni, he's been in England so long he was starting to lose his dutch accent, so whenever he went home, people would say "hey, for an englishman, you do a good dutch accent!"