Spain
As a percentage of the general population of all Spain, Spanish is natively spoken by 74%, Catalan by 17%, Galician by 7% and Basque by 2% of all Spaniards. Occitan is spoken by less than 5,000 people, only in the small region of "Val d'Aran".
Other Romance minority languages, though not official, have special recognition, such as the Astur-Leonese language ("asturianu", "bable" or "llionés") and Aragonese ("aragonés") in Aragon.
Spain
Spanish ("español")— recognised in the constitution as Castilian ("castellano")—is the official language of the entire country, and it is the right and duty of every Spaniard to know the language. The constitution also establishes that "the other Spanish languages"—that is, the other languages of Spain—will also be official in their respective autonomous communities in accordance to their Statutes, their organic regional legislations, and that the "richness of the distinct linguistic modalities of Spain represents a patrimony which will be the object of special respect and protection."