BTW, why is Brittany not in Celtic culture group anymore?
Why has Breton been changed to the French group?
Probably for the same reason Scottish is in the British group. They've spent centuries slowly absorbing French culture, are in the French sphere of influence, and use basically the same political structure that France does (as opposed to the more clan-based structure of the Irish and Welsh). They're definitely not "Francien", but they're definitely culturally similar enough to be in the same group.
Also, balance reasons .
That does make sense. But then shouldn't the west Finno-Ugric cultures much closer to Scandinavian than to Uralic?We're moving away from language = culture, in other terms of culture the Bretons were much closer to France than Ireland, and having them be forever nonaccepted (and thus culture-converted) by France every game is undesirable. Same reason we put Basque in the Iberian group.