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.
Spanish grammar
Spanish grammar is the grammar of the Spanish language ("español"), which is a Romance language that originated in north central Spain and is spoken today throughout Spain, some twenty countries in the Americas, and Equatorial Guinea in Africa.