What we call English was imported piecemeal into England, so it sounds like it's not the indigenous language of anywhere by your measure? It's native to Ireland, surely; in which case it seems fine.
I'm not sure Ireland would want to directly associate themselves with English (=England | UK) in that way. Clearly this is a very political question and so we can discard it from Christmas discussion :)
>> It's native to Ireland, surely; in which case it seems fine.
English is also "native" to many people in all countries around the world. In Ireland, many families speak Irish at home, not English.
Outside of school, there's very little usage. A few percent at most.
You're right, about politics. There are good historical reasons to hate what [English] nobility did in the past, but it's a mistake to dispense with using a common tongue because of that. My nan was shot at by "the English".
Common Latin use across Europe seems to have had a positive effect on the development of science for 1800 years or so?