Public | Dutch
In the 18th century, Martha's Vineyard had a proportional large number of deaf people. Common in isolated communities with large number of deaf people, a "village" sign", a type of local sign language, emerged. The language was widely shared by both deaf and hearing people, but rose and fell without being formally documented.
Source: NewScientist, 8 October 2016, p. 37
Martha's Vineyard, United States
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