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Sign language and its alphabet are standardized to what they are today, where every word in English could be said in sign language (jun 15, 1720 – jun 15, 2018)

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The Evolution of Sign Language

ByDavid Heineman

5 Nov 2017

0

0

656

Date:

jun 15, 1720

jun 15, 2018

~ 298 years

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