According to the website: Welcome to the dictionary of the indigenous language of Pukapuka! You can navigate the dictionary below, using the menu to toggle word and concept translations between the Pukapuka language and English, Rarotongan or the Northern Cook Island languages. If you are really keen to learn the language of the Pukapuka people, you can download and read Māmā Mele’s Pukapukan Grammar thesis for free by clicking on Māmā Mele’s lovely picture. (Fair warning, the file is 34mb!)