It was similar for my folks, they spoke Polish in the homes (my father exclusively until age 7 when he was finally able to go to school), but whether in the steel mills or working on the farms and otherwise in public, the families would speak English and took pride in trying to fit in with everyone else.
my Polish grandpa married my Ukrainian grandma, not sure what the heck they spoke in my dad's house! Funny thing, my Lithuanian grandma told me from when i was little NEVER to marry an Italian, "they are a different kind of people.." My gram said. "they beat their wives and set fire to each other's houses." Hey,that's what went on on her street! and what do i go and do but marry a dago!