Perhaps it's anecdotic but here we I live almost nobody changes language when speaking to a certain person, always we use the first language we talked to that p

Perhaps it's anecdotic but here we I live almost nobody changes language when speaking to a certain person, always we use the first language we talked to that person. I come from Spanish speaking parents, but half of my family spoke Catalan and my wife is Italian. I speak always in Catalan to my son, he speaks always to me in Catalan, my wife talks to my son in Italian and he talks in Italian to her. I spoke in Spanish to her. And the usual thing is change language in the middle of the speak when we change interlocutor. So I can start in Spanish if I look to my wife and end in Catalan when I look at my son. My friends to the same changing from Catalan to Spanish depending who they are looking at.