[Galaico]

It depends on what a meta-ethnicity means to you. If it’s just about languages, we could perfectly take away the word “ethnicity” from meta-ethnicity and leave as meta-linguistic group.

For example, I am a Romance speaker, but that doesn’t necessarily mean I feel any kind of ethnic closeness to any other Romance speaker, let’s say a Romanian. On the other hand, I can perfectly feel an ethnic closeness with a Basque, who’s not a Romance speaker (not even Indo-European speaker), but it is beyond doubt our ethnic kinship.

When I think of meta-ethnicity I think about the European peoples in general, whom all have a clear genetic and historical relation with each other. When I specifically think about my ethnicity, I think about a group of hunters and gatherers who crossed the Pyrenees and settled in Iberia in Upper Paleolithic times, exterminating the last Neanderthals, and painting the caves of Altamira. I can think about a small group of Neolithic farmers teaching their knowledge to those hunters and getting assimilated into the greater Iberian ethnicity. Many more things come to my mind, war against Rome, Latin assimilation, Germanic invasions, Reconquista, etc.

However, a linguistic group isn’t going to determine my ethnic feeling or awareness. That I speak a Romance language is just an “accident” in the ethnic evolution of part of my people.