Mutsun language is a nearly extinct language that was spoken by the Mutsun people of the San Juan Bautista region in central California. It is a member of the Utian language family, which also includes the related Rumsen and Chochenyo languages. Research on the Mutsun language involves studying the linguistic features, vocabulary, grammar, and syntax of the language in order to document and preserve it. Researchers also work to analyze the historical and cultural context of the language, as well as its relationship to other languages in the region. Efforts to revitalize the Mutsun language have included language revitalization programs, documentation projects, and collaboration with native speakers to preserve their linguistic heritage. The study of the Mutsun language is important for understanding the history and culture of the Mutsun people, as well as preserving and celebrating their unique linguistic heritage.