Some of the questions were eye opening. "I don't have a word for this" accurately describes my reaction to "what do you call the grass between the street and the sidewalk?" but my reaction to "What do you call the game where you throw a knife at your friend?" was a bit stronger.
Sort of the dead giveaway, "how do you pronounce the name of the city where the Mississippi flows into the Gulf of Mexico?" "Nawlins," of course, if you're a native.