It's a cute joke, but I feel that the US gets an unfair rap around languages. I know for a fact that plenty of people the UK (where I'm from) declare their hopelessness with foreign languages with a good deal of ... I don't know ... pride? humour? There's always going to be a number of talented bilingual folks there, but they're in the minority. I'd be interested to see how the UK and the US compare, I wouldn't be surprised if the US had a greater proportion of bilingual people.

I tested myself to see if I fit the stereotype by trying to explain this joke to a Japanese friend, in Japanese. After a collective effort which determined that there isn't a concise noun phrase in Japanese that's equivalent to "bilingual"/"trilingual" etc (anyone else know if that's actually the case?), I think the point was communicated, which I hope implies graduation to at least some limbo between "American" and "bilingual".