Otago has very low numbers of Māori language speakers – French is the most widely spoken second language in the region. Given this context, it is important that any interventions aimed at revitalising and maintaining the Māori language are evidence-based. There is ample research on second language acquisition but little that shows the actual as opposed to self-reported experience of the second language learner as transmitter of this language within the home. The aim of this research is to support local tribal and community language initiatives by developing a language intervention “tool-box” informed by in-home observations and national and international research.