My pre-teen son bursts laughing from time to time when he overhears me speaking Polish. Usually, at first I don't understand why, and then it hits me.
When I say in Polish "Jak?" (Why?), he hears "yuck".
When I say "blady" (pale), he hears "bloody".
When I say "skarpetki" (socks), he hears "scar-pet-key".
When I say "pół" (half), he hears "poo-w".
When I say "fart" (luck), he hears "fart".
:-)
