Solano is an unclassified extinct language formerly spoken in northeast Mexico and perhaps also in the neighboring U.S. state of Texas. It is a possible language isolate.

Solano is known only from a 21-word vocabulary list that appears at the end of a 1703–1708 baptism book from the San Francisco Solano Mission,^[1] which hosted at least four different peoples, including the Xarame, Payuguan, Papanac, and Siaguan.^[2] Supposedly the language is of the Indians of this mission – perhaps the Terocodame band cluster. The Solano peoples are associated with the 18th-century missions near Eagle Pass, Texas.

The 21 known Solano words, as reproduced in Swanton (1940), are:^[3]

Below is a comparison of selected words from Zamponi (2024). There are no obvious cognates with other neighboring languages.^[2]

• Solano people
• Amotomanco language
• Aranama language
• Tanpachoa language

• Campbell, Lyle. (1997). American Indian languages: The historical linguistics of Native America. New York: Oxford University Press. ISBN 0-19-509427-1.
• Goddard, Ives (Ed.). (1996). Languages. Handbook of North American Indians (W. C. Sturtevant, General Ed.) (Vol. 17). Washington, D. C.: Smithsonian Institution. ISBN 0-16-048774-9.
• Sturtevant, William C. (Ed.). (1978–present). Handbook of North American Indians (Vol. 1–20). Washington, D. C.: Smithsonian Institution. (Vols. 1–3, 16, 18–20 not yet published).