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 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 the most popul ...

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