Qahveh Khaneh Sign Language, literally Coffee House Sign Language, is a

deaf 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. Sign l ...

of a few elderly members of the deaf community in

Tehran Tehran (; fa, تهران ) is the largest city in Tehran Province and the Capital city, capital of Iran. With a population of around 9 million in the city and around 16 million in the larger metropolitan area of Greater Tehran, Tehran is th ...

. It has been in use since 1900 or earlier. It is unknown if it is related to

Iranian Sign Language Iranian Sign Language (ISL) is the sign language used by Deaf and hard-of-hearing people in Iran. It is a true sign language, unlike the Baghcheban phonetic hand alphabet, which is a form of cued speech. Deaf community in Iran The estimat ...

; it is possible that it descends from an ancestral form of Iranian Sign Language, dating to before that language was standardized.Erik Anonby, Mortaza Taheri-Ardali & Amos Hayes (2019) ''The Atlas of the Languages of Iran (ALI)''. Iranian Studies 52
A Working Classification
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References

{{sign language navigation Sign languages Sign languages of Iran