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  2. Until the 19th century, most of what we know about historical sign languages is limited to the manual alphabets ( fingerspelling systems) that were invented to facilitate transfer of words from an oral to a sign language, rather than documentation of the sign language itself.

  3. Sign language. Sign languages (also known as signed languages) are languages that use the visual-manual modality to convey meaning, instead of spoken words. Sign languages are expressed through manual articulation in combination with non-manual markers.

  4. Dec 4, 2023 · Historical Evolution. The roots of LSF trace back to the 18th century, emerging within Deaf communities across France. Abbé Charles-Michel de lÉpée, a compassionate educator, is often revered as the pioneer who formalized sign language as a means of instruction for the deaf.

  5. Legend has it that on the ship back to America, Thomas Hopkins Gallaudet taught Laurent Clerc English while Clerc taught Gallaudet sign language. After setting up the American School for the Deaf in 1817, they incorporated many of the signs that were already being used in America.

  6. communication technique. Also known as: FSL. Learn about this topic in these articles: development. In sign language: Inability to speak. From l’Epée’s system developed French Sign Language (FSL), still in use in France today and the precursor of American Sign Language (ASL) and many other national sign languages. Read More.

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