Thanks, dodyskin. It turns out the person who contributed that particualr language is one of the main contributors to the list overall. Also the list for Moriori may not be very accurate anyway, according to other pages I have Googled. In short, it looks like the answer to my question, "how do they know?", is the one I would have expected: they don't.


noho ora mai
http://maxqnzs.com/References.html