Hawaiian is a Polynesian language with relatively small dialectal differences among the Hawaiian islands. The Hawaiian language has a rich oral history, like Maori, and was not written down until the 18th century. And in 2018, Evertype published Harry Potter and the Philosopher's Stone in Hawaiian. The book was translated by R. Keao NeSmith and is only available in softcover. 
To learn more about the Hawaiian language, Click Here and Here.
To hear the 1st paragraph, Click Here.