The ISL (Irish Sign Language) is the sign language irish, used by the deaf community in irish as the primary means of communication. The ISL is a natural language with its own grammar, syntax and vocabularyused to express concepts and ideas through the combination of gestures, facial expressions, and body movements.

The ISL has been officially recognized as an official language in Ireland in 2017, and the irish government has adopted policies to promote the use and dissemination.