Damin (Demiin in the practical orthography of Lardil) was a ceremonial language register used by the advanced initiated men of the aboriginal Lardil (Leerdil in the practical orthography) and the Yangkaal peoples of Australia. Both inhabit islands in the Gulf of Carpentaria, the Lardil on Mornington Island, the largest island of the Wesley Group, and the Yangkaal on the Forsyth Islands. Their languages belong to the same family, the Tankic languages. Lardil is the most divergent of the Tankic languages, while the others are mutually comprehensible with Yangkaal.