Stoney, also called Nakoda or Alberta Assiniboine, is a Dakotan Siouan language of the Northern Plains, spoken by about three thousand people in Alberta. It is closely related to and shares distinctive features with Assiniboine, though it is hardly more intelligible with it than it is with Dakota Sioux.
^Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Stoney". Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology.
^Ullrich, Jan (2008). New Lakota Dictionary (Incorporating the Dakota Dialects of Yankton-Yanktonai and Santee-Sisseton). Lakota Language Consortium. p. 4. ISBN0-9761082-9-1. To be precise, Ullrich states that Stoney "is completely unintelligible to Lakota and Dakota speakers", while Assiniboine is not comprehensible to them, "unless they have been exposed to it extensively" (p. 2).
^Parks, D. R.; DeMallie, R. J. (1992). "Sioux, Assiniboine, and Stoney Dialects: a Classification". Anthropological Linguistics34 (1-4).