Too true, but the language can infect. The affectation of clearly non-genetic speakers. See: ebonics.
Actually, I’m not sure what is the point of the original blog post.
I thought it was well-known that Irish are related to Basques.
And the Basques aren’t as genetically distinct as was historically assumed, but they certainly are culturally distinct, as are the Irish-Scots. Probably isolation on the peripheries of the continent.