In many Chinese families it’s pretty common for people to talk to each other in completely different languages. My New York aunt speaks to me in Mandarin / Hokkien. She speaks to her husband in Toishanese. They speak Cantonese to other people. We all sort of understand each other when we are speaking different languages, but respond in our own language. From time to time we might dip into another language to illustrate a point.
My grandma used to call this ‘chicken and duck talk’


