Three that come to mind...
Laywer: Well, what about that tatoo on your chest? Doesn't it say Die, Bart, Die?
Sideshow Bob: No, that's German for 'The Bart, The."
Parole Judge: No one who speaks German can be an evil man! Parole Granted!
Milhouse: "I can't go to juvie, they use guys like me as currency."
Mr. Burns: I don't like being outdoors Smithers, for one thing, there's too many fat children.