Barbareño (Barbareño: Šmuwič) is one of the Chumashan languages, a group of Native American languages spoken almost exclusively in the area of Santa Barbara, California. The closely related Ineseño (Ineseño: Sʰamala) may have been a dialect of the same language. A dialect of the Barbareño language was also "spoken at San Emigdio near Buena Vista Lake" in the southern Central Valley. This dialect, called Emigdiano, "was heavily influenced by Buena Vista Yokuts." Barbareño lost its last known native speaker in 1965 with the death of Mary Yee. Both Barbareño and Ineseño are currently undergoing processes of language revitalization. An Ineseño dictionary was published in 2007.

As of 2013, the Barbareno Chumash Council is engaged in ongoing efforts to revive the language. Two of its members are language apprentices and teachers. Wishtoyo Chumash Village, in Malibu, California, announced the opening of its Šmuwič Language School in 2010.