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. Sig ...

of a few elderly members of the deaf community in

Tehran Tehran (; , ''Tehrân'') is the capital and largest city of Iran. It is the capital of Tehran province, and the administrative center for Tehran County and its Central District (Tehran County), Central District. With a population of around 9. ...

. 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

References

{{sign language navigation Sign languages Sign languages of Iran