I'll give you my perspective as a daughter of Eastern European parents, and I speak the language too.
Both my dps came to this country as skilled workers, and were basically from peasant backgrounds. Their words, not mine.
They were here long before the EU was formed.
They have both voted out due to not liking being told what to do by the EU, as they both lived under communism, and feel it is just the same structure.
I know of parents at my dd's school who are from my dps country, and none of them would speak to me. I bet as soon as I opened my mouth to talk to these people in my dps language they would speak to me. I find it such a shame that people in my home town don't intergrate as much as I would have liked.
When my dps had me and db at school, my mum would talk to everyone, and was inclusive.
I went to school speaking this language, and didn't have any form of support that the kids have today.
I have a friend who is a teacher, and she has to constantly remind the Polish kids to not speak their language in class as they are excluding others. This is at a Catholic school. It does sadden me, that they get this support, obviously at an extra cost to the education system, and they are not using it within the school system.