Dhuwal (also Dual, Duala) is one of the Yolŋu languages spoken by Aboriginal Australians in the Northern Territory, Australia. Although all Yolŋu languages are mutually intelligible to some extent, Dhuwal represents a distinct dialect continuum of eight separate varieties. In 2019, Djambarrpuyŋu became the first Indigenous language to be spoken in an Australian parliament, when Yolŋu man and member of the Northern Territory Legislative Assembly Yingiya Guyula gave a speech in his native tongue.^[7]

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.^[8]

Ethnologue divides Dhuwal into four languages, plus Dayi and the contact variety Dhuwaya (numbers are from the 2006 census.^{[citation needed]}):

• 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^{[clarification needed]} used by the younger generation in informal contexts, and is the form taught in schools, having replaced Gumatj ca. 1990.^{[citation needed]}

Vowel length is contrastive in first syllable only.^[9][10]

Probably every Australian language with speakers remaining has had an orthography developed for it, in each case in the Latin script. Sounds not found in English are usually represented by digraphs, or more rarely by diacritics, such as underlines, or extra symbols, sometimes borrowed from the International Phonetic Alphabet. Some examples are shown in the following table.