they're embarassing...
italian: add a random 'a' to words. 'there-a on-a the low-level-a radar'
chinese: use lots of 'ah' sounds and bad grammar. 'no-ah picture please. please to-ah be joining ah-ffical press tour!'
german: say 'ja' and add t's to words. 'Ja, ist goodt!'
and Beaver doesn't sound remotely Canadian....
and the whole 'he's a Yank too, but we don't hold that against him' line is racist...