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In 1980, it was estimated that there were fewer than 700 speakers of the language, including both the elderly and young. Hinton (1994:32) put a conservative estimate of the number of speakers at 150, and a liberal estimate at 400-500. As of 2009, 93 preschoolers were learning Quechan in the Quechan tribe's language preservation program, and the number of fluent speakers was estimated to be about 100. A Quechan dictionary was in progress.
A 2010 documentary, “Songs of the Colorado,” by filmmaker Daniel Golding features traditional songs in the Quechan language. Golding says, "The songs are all sung in the language, so if you're not learning and picking up the language, then you won't be able to understand the songs ... there are actually words telling stories..."
- Quechan at Ethnologue (15th ed., 2005)
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Quechan". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Golla, Victor (2011). California Indian Languages. University of California, Berkeley: University of California Press.
- Mithun, Marianne. 1999. The Languages of Native North America. Cambridge University Press.
- Kendall, Martha B. 1983. "Yuman languages". In Southwest, edited by Alfonso Ortiz, pp. 4-12. Handbook of North American Indians, William C. Sturtevant, general editor, Vol. 10. Smithsonian Institution, Washington, D.C.
- Anne Slagill (2009-07-27). "Tribal program seeks to preserve Quechan language". The Yuma Sun. Retrieved 2012-09-22.
- "Yuman Language Family Summit Home Page". Retrieved 2012-09-22.
- Nancy Gilkey (2010-12-08). "Tribal music documentary premieres Saturday". YumaSun. Retrieved 2012-09-22.
- Hinton, Leanne. 1994. Flutes of Fire: Essays on California Indian Languages. Heyday Books, Berkeley, California.
- Halpern, Abraham M. (1947). A grammar of the Yuma language. Chicago: University of Chicago.
- Langdon, Margaret (1976). Yuman texts. Chicago: University of Chicago Press.
- Hinton, Leanne; Lucille J. Watahomigie. Spirit mountain: an anthology of Yuman story and song. Tucson, AZ: Sun Tracks and the University of Arizona Press. ISBN 9780816508174
- Quechan (Yuma) language overview at the Survey of California and Other Indian Languages
- Yuma, California Language Archive
- Yuma, OLAC: Open Language Archives Community
- Quechan/Yuma Indian Language
- Yuman comparative vocabulary