What should I do?

My boyfriend is biracial mixed with Lao and Indian he speaks about 3 languages pretty fluently plus two he learned or is currently learning. He speaks English, Laos, and Hindi pretty fluently. He learned some Spanish In middle school and he's currently learning French. Sometimes when we have issues he liked to talk about me to his mother (who is Lao) ive been with him for a while to pick up when hes talking about me. I feel like he talks about me a lot. And I know he talks badly about me. This really irritates me. I tried to confront him about it and all he did was call me racist because I didn't like him talking I'm Laos about me. What should I do?