jokes are funnier when they've got a nugget of truth i think. if the joke was about americans being fat and putting cheese on everything, or about how we're the richest country in the world but people die all the time because they can't afford basic medicine, i doubt there'd by any complaints. but saying that we can't speak any language feels less like poking fun at regional differences, and more like just, idk, lying for the sake of being cruel?