平原印第安人手语(英語:Plains Indian Sign Language,PISL;法語:Langue des Signes Indienne des Plaines;西班牙語:Lenguaje de Signos Indio de las Llanuras),又称平原手语、平原手势谈话(Plains
endonyms; The language in question is actually a language family; The language or community of speakers has a prohibition against writing the language; No documentation
[2009-05-16]. (原始内容存档于2012-10-15). Lakota Language Consortium. [2016-07-28]. (原始内容存档于2011-05-01). About the Lakota Language Program. Red Cloud Indian School.
Dave Elliott and the SENÇOÎEN Alphabet (PDF). [2021-08-28]. (原始内容存档 (PDF)于2021-04-15). Saanich Language,"How to pronounce SENĆOŦEN"[3] (页面存档备份,存于互联网档案馆)