Borat--An Israeli Pretending to be a Kazakh:

Having just seen "Borat," I'm afraid it turns out that the Jews have played another hoax on the Kazakh people. The Kazakh documentarian Borat is actually an Israeli! Despite his rugged Kazakh looks and cunning Kazakh accent, when he is not speaking English in the movie, he is actually speaking Hebrew! Those Jews will stop at nothing to undermine the good name of Kazakhstan.

In all seriousness, Borat is really speaking Hebrew, usually at least a rough translation of what the English subtitles say. Turns out that Sacha Baron Cohen spent a year in Israel as a young man, according to his Wikipedia biography.