The Castilian people (Spanish: castellanos) are certain inhabitants in regions of central Spain including at least the eastern part of Castile and León, the northern and eastern parts of Castile-La Mancha, and the Madrid community, who are the source of the Spanish language (Castilian) among other aspects of cultural identity. However, not all people in the regions of the medieval Kingdom of Castile think of themselves as Castilian. For this reason, the exact limits of what Castile is today are disputed.