Yokuts, formerly known as Mariposa, is an endangered language spoken in the interior of Northern and Central California in and around the San Joaquin Valley by the Yokuts people. The speakers of Yokuts were severely affected by disease, missionaries, and the Gold Rush. While descendants of Yokuts speakers currently number in the thousands, most of the constituent dialects are now extinct. The Yawelmani dialect of Valley Yokuts has been a focus of much linguistic research. Dialects The Yokuts language consists of half a dozen primary dialects. An estimated forty linguistically distinct groups existed before Euro-American contact. The following classification appears in Whistler & Golla (1986). Poso Creek Palewyami Yokuts (also known as Poso Creek, Altinin) General Yokuts (all others) Buena Vista Tulamni Hometwali Nim Tule–Kaweah Wukchumni Yawdanchi (also known as Nutaa) Bokninuwad Northern Yokuts Gashowu Kings River Chukaymina (also spelled Chukaimina) Michahay Ayitcha (also known as Aiticha, Kocheyali) Choynimni (also spelled Choinimni) Valley Yokuts (see) Speakers and language revitalization Most Yokuts dialects are extinct, as noted above. Those that are still spoken are endangered. Until recent years, Choinimni, Wikchamni, Chukchansi, Kechayi, Tachi and Yawelmani all had a few fluent speakers and a variable number of partial speakers. Choynimni went extinct in 2017. Wikchamni, Chukchansi, Tachi, and Yawelmani were being taught to at least a few children during the first decade of the twenty-first century. Chukchansi is now a written language, with its own alphabet developed on a federal grant. Chukchansi also has a phrase book and dictionary that are partially completed. In May 2012, the Linguistics Department of Fresno State University received a $1 million grant to compile a Chuckchansi dictionary and grammar texts, and to "provide support for scholarships, programs, and efforts to assemble native texts and create a curriculum for teaching the language so it can be brought back into social and ritual use." Genetic relations Yokutsan is a key member in the proposed Penutian language stock. Some linguists consider most relationships within Penutian to be undemonstrated (cf. Campbell 1997). Others consider a genetic relationship between Yokuts, Utian, Maiduan, Wintuan, and a number of Oregon languages to be definite (cf. DeLancey and Golla 1997). Regardless of higher-order disagreement, Callaghan (1997) provides strong evidence uniting Yokuts and the Utian languages as branches of a Yok-Utian language family. The term "Delta Yokuts" has recently been introduced in lieu of the longer "Far Northern Valley Yokuts" for the dialect spoken by