Spanish language
In Spain and in some other parts of the Spanish-speaking world, Spanish is called not only (Spanish) but also (Castilian), the language from the kingdom of Castile, contrasting it with other languages spoken in Spain such as Galician, Basque, Asturian, Catalan, Aragonese and Occitan.
Languages in censuses
Spanish ("español")—officially recognized 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 "all other Spanish languages"—that is, all 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."