My brother-in-law's children are trilingual, and they react differently depending which language you talk to them in. Because they speak French at school, if yo

My brother-in-law's children are trilingual, and they react differently depending which language you talk to them in. Because they speak French at school, if you ask them to clean up or eat their vegetables in French they do it without complaining. But do it in Polish of English, nope, not having any of it. 4 and 7 years old.