It is completely feasible. In fact Spain was the project of many different kingdoms (or "nations" by modern standards): Basque, Aragon/Catalan, Galician and Castilian.
Not only that but many modern leftist political parties advocate for self determination freedom within our constitution.
So the fact that the Catalan parliament with a simple majority of separatists are claiming unilateral referendum of independence in a free country is just to gather momentum.
Not only that but many modern leftist political parties advocate for self determination freedom within our constitution.
So the fact that the Catalan parliament with a simple majority of separatists are claiming unilateral referendum of independence in a free country is just to gather momentum.