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Currently there is Gestuno, an international language for the deaf that is only really used at international events. However, most deaf individuals use French Sign Language, American Sign Language, or some other regional sign language from their home country. (correct me please if I am wrong)

Given that there are relatively few deaf individuals (as compared to the total population) one would think that a more global sign language would be more commonplace, if only to bring deaf people worldwide together, build stronger communities, and integrate into society.

With a post-1900 POD, would a worldwide, or at least dominant, sign language be possible? At least in the First World, Communist Sphere, or other zone of influence?

Possible POD's I can think of are:
1. No WW1-more globalized world leads to mroe contact between def individuals globally, thus building NGO's that heavily sponsor this
2. Somehow differing weapons in WW1 and/or 2 lead to a large increase in the deaf population, forcing governments to sponsor this to repair society
3. A Rockefeller or Carnegie type Philanthropist takes this upon himself to help the deaf
4. As part of Cold-War or Great Society Programs, the US builds an Intl. Institute for the deaf, using a sort of "language imperialism" to win over the deaf from endorsing socialism or communism (like Helen Keller did OTL) and to help poorer countries (or visa versa in the USSR)
5. Slightly Faster Globalization plus a stronger World Federation for the Deaf (probably the most likely)

Thoughts? Please correct me if I stated anything wrong or rude.
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