We appreciate your interest however, we don't have any news to share about New Zealand's native language Maori for Google Home/Nest devices. We're always looking for ways to improve and we'll take it as feedback. For further information, click the link Change the language of Google Assistant to know more about our supported language.
I suggest that you send feedback by following this link. Let me know if you have other questions or concerns, otherwise I’ll be locking this thread after 24 hours.