Castilian is a noun and adjective that refers to the region and former kingdom of Castile in Spain; in particular, it may refer to a native person of Castile or to the language of this region, and is therefore considered by many to be a synonym of Spanish, though with different nuances. The following articles provide further information.

• Castile, for information on the region and its people.
• Castilian people, for the ethnic group from this region.
• Spanish language, for general information on the language including dialectal variation in Castile, the rest of Spain and Spain's former colonies.
• Names given to the Spanish language, for details on the use of the terms español, castellano, Spanish and Castilian.
• Castilian Spanish for information on the dialect of Spanish spoken in Castile, or Spanish dialects and varieties for a more general scope.

See also

• Castile (historical region)
• Castile and León
• Castile-La Mancha
• Kingdom of Castile
• Kingdom of León
• Crown of Castile
• Nationalities of Spain
• Castilian people
• Andalusian people

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