High Quality Content by WIKIPEDIA articles! Wintu is an endangered Wintuan language spoken by the Wintu people of Northern California. Wintu is the northernmost member of the Wintun family of languages. The Wintuan family of languages was spoken in the Sacramento River Valley and in adjacent areas up to the Carquinez Strait of San Francisco Bay. Wintun is a branch of the Penutian stock of languages of western North America, more closely related to four other families of Penutian languages spoken in California: Maiduan, Miwokan, Yokuts, and Costanoan.