When he first greets Diana, they speak in Blackfoot — a language spoken only by a certain group of Native Americans and also Wonder Woman — and introduces himself as Napi.
When Diana first journeys to the frontlines with Steve Trevor, she is introduced to the last of their unsanctioned battle party, Chief.
It’s important to note that this is the only non-English exchange that isn’t subtitled, and viewers are left to figure that Napi is just his real name.
Chief (Eugene Brave Rock) is a smuggler who has come to help the war effort, and though he makes a nice little profit on the side, he’s portrayed as being the noblest of the bunch.