To learn jokes in a number of different languages, I would think. Still, only knowing the language does make jokes difficult; I don't understand some English jokes, but I laugh anyway, usually, so no one knows.

[Chekov always needs to convince others that he knows what's going on, especially when those others are his superior officers. Uhura, however, doesn't count, just as Sulu doesn't count.

He slides a menu towards her.]

Please, have what you like. After, I can show you where I live and you can meet Howl and Sophie.