Home language variation in the narratives of urban First Nations Australian children in their first year of school.

First Nations children may speak a dialect of English that has different grammatical rules from Standard Australian English (school language). Limited studies have investigated Aboriginal English (home language) dialect in First Nations children and its impact on differential diagnosis of language disorder. This study measured the density of home language dialect and grammatical accuracy in oral narratives produced by typically developing First Nations children. Non-standardised assessment narrative protocols were used to elicit language samples from 27 Australian First Nations children aged 4.5-6 years. Local home language dialectal features were coded into the sample and grammatical accuracy was calculated separately for school language and home language. All children displayed some use of home language features. The most common home language features used were alternative use of regular past tense and irregular past tense, zero use of regular and irregular past tense, and alternative use of pronouns. Dialect density varied highly amongst participants. Grammatical accuracy was higher for home language than school language. Speech pathologists and teachers need to be aware of differences between home and school language for First Nations children to avoid misdiagnosis of language disorder. More research is required to gain normative data that informs culturally appropriate assessment practices for this population.