Diyari language

Diyari is a Pama-Nyungan language of the Karnic group traditionally spoken in far north South Australia east of Lake Eyre, with present-day speakers based in Marree, Port Augusta, Broken Hill and Adelaide. UNESCO classifies it as critically endangered; the 2021 census recorded 34 native speakers, though linguist Peter K. Austin has disputed lower counts, documenting hundreds of people who know at least some Diyari words and expressions. Nineteenth and early twentieth century Lutheran missionaries gave Diyari an unusually extensive written form, and the language historically had a developed sign language and three distinct morphosyntactic alignment systems across different grammatical categories.