This is a very crude division. There are way more Poles than, say, Galicians (a small and fairly unique community of Spain). As for Britain, how many people do still speak Scottish Gaelic? Etc.

At the end of the day, loss of any culture in the world is tragic and previous colonialism isn't a good reason to wish punishment of cultural obliteration on contemporary inhabitants of the same countries, who are several generations distant from the perpetrators.