According to linguist
Robert M. W. Dixon, • Dialects of the Yirritja
moiety are (a)
Gupapuyngu and
Gumatj; • Dialects of the Dhuwa moiety are (b)
Djambarrpuyngu,
Djapu,
Liyagalawumirr, and
Guyamirlili (Gwijamil). • In addition, it would appear that the '''Dhay'yi
(Dayi
) dialects, (a) Dhalwangu
and (b) Djarrwark''', are part of the same language.
Ethnologue divides Dhuwal into four languages, plus Dayi and the contact variety Dhuwaya (numbers are from the 2006 census.): • Dhuwal proper, Datiwuy, Dhuwaya, Liyagawumirr, Marrangu, and Djapu: 600 speakers • Djampbarrpuyŋu, 2,760 speakers • Gumatj, 240 speakers • Gupapuyngu, 330 speakers • Dhay'yi (Dayi) and Dhalwangu, 170 speakers
Dhuwaya is a stigmatised contact variant used by the younger generation in informal contexts, and is the form taught in schools, having replaced Gumatj ca. 1990. ==Modern usage==