Talking with a British colleague who mentioned he was at a French restaurant in London with his sister. The waiter came over and asked if their meal was OK and his sister replied, in French, that it was an excellent meal. The waiter apologized, explaining that he was from Indonesia and didn't speak French. So she repeated what she said in Indonesian. The shocked waiter replied that he was actually from Bali and didn't speak Indonesian. So she repeated what she said in Balinese.
Damn. Just damn.
Many people (usually not British or American) speak several languages, but they're usually European or African. Frankly, were I the waiter, I think my brain would have imploded at that point.