* Castilian: This is the name of the language as spoken in Castile, the region where it originated. It's sometimes used to distinguish it from other Romance languages spoken in Spain.
* Español: This is the name of the language in Spanish. It's often used in formal contexts and academic settings.
* Castellano: This is another name for the language, especially in Latin America. It is considered more formal than "Español."
It's important to note that "Spanish" is the most widely recognized and accepted name for the language globally.