The Spanish speak of ‘the Spains’ in plural.
With Aragon, Castille, Valencia at the coast, Anducia in the south, Galicia on the Atlantic – Celts, and Catalonia on the French border on the Meditaranean there is indeed more than one Spain. Each with their own language and heritage.
And that’s without mentioning the Basques, their language is so unique it is not even part of the collected Indo European languages.
Only the old Hungarian and Finnish share the priviledge as far as I know. Apparently there is a tribe in Siberia who’s language is also related to the old Hungarian.