I copied the following from Ways of Being as I quite liked the explanation and description of Aboriginal English.
Most Australian Aboriginal people cannot speak Aboriginal languages, and many speak Aboriginal English, of which there are many varieties but also common features. As linguist Diana Eades writes, ‘In many subtle ways Aboriginal English is a powerful vehicle for the expression of Aboriginal identity’. The accent is distinctive. For example, Aboriginal languages did not have an ‘h’ sound so the ‘h’ sound is often left off word beginnings. While Aboriginal languages and links to land may be lost, particularly for urban people, Aboriginal English shows an enduring link to Aboriginal culture — the accents, residual grammatical structures, concepts and words from Aboriginal languages are still in use.The grammatical structure of Aboriginal languages is often transposed onto English. Aboriginal English is not ‘bad English’, just a different kind of English with its own grammatical rules. It is a vivid and expressive spoken form; as a colloquial form of English it is not often used in writing.