That happened to me in Mandarin once. I was getting my ebike fixed, some other customer started talking to me. I didn't understand what he said, and he started saying it slower and louder. The other customers in the shop saw what was happening and were like, hey he doesn't understand, buddy. I was sheepish, damn I live in the country, I should be able to speak the national language, right?

Oddly enough, I felt awesome after this encounter. Usually if they see your face they won't even try, or will just treat you like they were talking to a cow or something. The fact that I got treated like a peasant from the countryside was an amazing achievement. I felt, just for a moment, like one of them.

Today, shit, most young people speak English. Anyone who serves tourist destinations certainly will. It kind of sucks, honestly.