They say a joke isn't funny if you have to explain it. But the "con dios" reply was hilarious if you understand Kramer's wacky, not a renaissance-man type humor. I was roaring when I heard the joke. "Vaya con dios!" Kramer wrinkles his nose "Con dios? That was rude" Get it? He thinks it means something that it doesn't. That's the joke. It has nothing to do with the writers thinking no one will understand spanish. Quite the opposite, they think the viewers WILL understand that phrase.