I only go to the salon for trimming so I only care about one thing: my hair getting trimmed evenly, and only having the half inch taken off (a real half inch, not the stylists idea of a half inch). That's it. I don't care if they're talking to each other in a different language, I don't care if they have to stop to take the phone or talk to walk-in customers, I don't even care if they're complaining about my hair. I don't care about excessive politeness or whatever. Just do what I ask, do it well, and I'm happy.
It's kind of ridiculous to expect people to not have a conversation at work in their own language. They aren't robots! Humans need to communicate. I once went into a Korean salon. It was early in the day, and I was the only customer. The two ladies spent the whole time chatting to each other in Korean, and I couldn't care less what they were talking about. Maybe they were talking about me, it doesn't matter as long as I get what I want. Although at one point, the lady who wasn't doing my hair came over, said something quietly to the stylist and smiled. The stylist nodded and said to me "My friend says you have a very clean scalp and wants to know what you use at home" They were talking about me, but it wasn't something I'd get upset over.