Is Sikorski a Pole? Yes. Does he speak English? Yes.
And I know a few Polish people, born in Poland but grew up in Chicago and in Greenpoint, Brooklyn, that speak amazing English. Are they Poles? Yes. Do they speak English? Yes.
Don't play dumb here. If an Englishman spends 20 years in germany and tells you he speaks german, who would give a flyin' toss? It's expected, and it's not thread worthy.
Nobody wants to read a thread about poles that speak english that have spent decades in english speaking countries and I can guarantee you the OP wanted to display Poles who have learned
English, not people that grew up in Australia or the UK that have Polish roots or some random Polish last name or people that spent decades living in English speaking countries, were educated in their universities, etc. It's not an accomplishment at that point, it's simply expected.
Rostowski born in London in a family of immigrants who stayed in the UK after 1945
this is what i'm talking about and it's a waste to even mention Rostowski.