Sometimes small changes can seem kind of ridiculous. Throughout Friends, it's mentioned that Phoebe (Lisa Kudrow) speaks fluent French. However, in season eight, episode 5, "The One With Rachel's Date," a subplot is built around the fact that Phoebe doesn't understand some basic French words.

Sure, this is a relatively minor bit, but why not choose a word in any other language if we've already established on numerous occasions that she speaks the language of love?