Basque is also spoken , but it is not related to Spanish . Therefore , the Spanish language is sometimes called Castilian , named after Castile , a region in Spain where the language came from . In Spain and in some parts of the Spanish speaking world , but not all , Spanish is called ' ( Castilian ) as well as ' ( Spanish ) , that is , the language of the Castile region , contrasting it with other languages spoken in Spain such as Galician , Basque , and Catalan .