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, however, classify it as the sole member of the "Kalkatungic group" of the Pama-Nyungan family, and Dixon (2002) regards Kalkatungic as an areal group.
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.
^*Blake, B. J. (1979). A Kalkatungu grammar. Canberra: Pacific Linguistics.
^Kendon, A. (1988) Sign Languages of Aboriginal Australia: Cultural, Semiotic and Communicative Perspectives. Cambridge: Cambridge University Press.
Roth, Walter E. (1897). The expression of ideas by manual signs: a sign-language. (p. 273–301) Reprinted from Roth, W.E. Ethnological studies among the North-West-Central Queensland Aborigines. London, Queensland Agent-Generals Information Office, 1897; 71–90; Information collected from the following tribes; Pitta-Pitta, Boinji, Ulaolinya, Wonkajera, Walookera, Undekerebina, Kalkadoon, Mitakoodi, Woonamurra, Goa. Reprinted (1978) in Aboriginal sign languages of the Americas and Australia. New York: Plenum Press, vol. 2.