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In 1988, an estimated 30 individuals spoke Tachi, including a number who spoke Tachi as a first language.
Revival efforts
In 1987, the Santa Rosa Rancheria piloted a language renewal program, Tachi as a Second Language, through the tribe's Head Start language program. The program sought to increase language exposure among young children within the tribe.
^ Britsch, Susan (1989). "Research Currents: The Contribution of the Preschool to a Native American Community". Language Arts. 66 (1): 52–57. doi:10.58680/la198924848. ISSN0360-9170. JSTOR41411354.