Extinct languages of North America Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Martha's Vineyard Sign Language Pages in category "Extinct languages of North America" This category contains only the following page. M Martha's Vineyard Sign Language Retrieved from "http://psychology.wikia.com/wiki/Category:Extinct_languages_of_North_America"