That’s different question though on the census, about nationality of Polish citizens. Most of numbers of minorities with citizenship in Poland are Polish minorities who were born in Poland. Like Silesians who are not even officially considered minority and still half million of them wrote that in (in reality there’s at probably around a million of them since once the census bureau included them despite government not wanted to admit them at all). And even let’s say Polish Germans, Belorussians and Ukrainians (at least those 80000 mentioned in this census) are also living here for generations due to how frequently borders changed in last two centuries.

Polish state is also relentlessly engaging in polonisation of minorities since 1918.