The Luiseño language is a member of the Uto-Aztecan language family, primarily spoken by the Luiseño people, an Indigenous group in Southern California. It is traditionally used in the regions around the Santa Margarita River and the Temecula Valley. The language has several dialects, including Serrano and Cahuilla, reflecting the diverse communities within the Luiseño territory. Efforts to revitalize the Luiseño language have been ongoing, with programs in schools and community initiatives aimed at teaching younger generations. The language is an essential part of the Luiseño culture, encompassing their history, traditions, and worldview.