trainingforstarfleet:

The character of Chief from Wonder Woman was played by Eugene Brave Rock who is from the Kanaii reserve in Southern Alberta. He took the inspiration for his character from real life WWI hero Mike Mountain Horse who is also from southern AB.
In the film Chief greets Diana in Blackfoot. Shortly after they have a conversation about how his people’s land was taken away by Steve’s people.

This is how you have First Nations representation: cast First Nations actors, draw from historical First Nations heroes and if they are going to speak a First Nations language cast someone who is part of that Nation!