Indian SignLanguage,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 Sign Talk)或第一民族手语(First
Jennifer. 2020. Speaking Spanish in the US: The Sociopolitics of Language. Multilingual Matters. Lipski, John M. 2008. Varieties of Spanish in the United States
Coppola, M. Creation through Contact: Signlanguage emergence and signlanguage change in Nicaragua.. Language Creation and Change: Creolization, Diachrony