Kalkatungu (also Kalkutungu, Galgadungu, Kalkutung, Kalkadoon, or Galgaduun) is an extinct Australian Aboriginal language formerly spoken around the area of Mount Isa and Cloncurry, Queensland.^[1][2]

Apart from the closely related language, Wakabunga, Kalkatungu is sometimes grouped with Yalarnnga as the Kalkatungic (Galgadungic) branch of the Pama–Nyungan family. O'Grady et al.,^[3] however, classify it as the sole member of the "Kalkatungic group" of the Pama-Nyungan family, and Dixon (2002)^[4] regards Kalkatungic as an areal group.

Emeritus Professor Barry Blake, Sheree Blackley^[5] and others have revived the language based on recordings, written grammars and personal memories. Robert Ah Wing, assisted by Uncle Arthur Peterson^[6] is also active in this field. Often, emphasis is placed on belonging, passing on elements of language to younger Kalkatungu.

Like in English, word stress is realised in terms of loudness. Sentence stress is also organised similar to English with the first syllable in the final word of a phonological phrase getting the main stress. (tonic stress) Moreover, if there are more than two words in a phrase, the first syllable of the first word receives more stress than the non-final words.

Below is a basic vocabulary list from Blake (1981).^[8]

Kendon (1988) shows that Kalkatungu also had a developed signed form of their language.^[9]