Researched
Sign Language Schools
Abbé de l'Épée opens a free school for deaf pupils in Paris (about 1760) and teaches in their own signs.
Open in the interactive tree →He treated sign as a real language, and teachers from the Paris school carried French Sign Language abroad; Laurent Clerc brought it to the US, where it shaped American Sign Language. Linguists such as Stokoe (1960) later showed that sign languages have full grammars.
Prerequisites
- Spoken Languageat least ~135,000 years ago?
- Enlightenment & Encyclopedia1715-1789
Unlocks
Not fully verified: Sources give founding dates between the 1750s and 1771.