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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 (15 Jun 1720 Jahr – 15 Jun 2018 Jahr)

Zugefügt zum Band der Zeit:

The Evolution of Sign Language

ByDavid Heineman
5 Nov 2017
0
0
638

Datum:

15 Jun 1720 Jahr
15 Jun 2018 Jahr
~ 298 years
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