Apache...that's why the enemy never could figure out the audio messages sent between our Apache speaking radiomen.
Are you sure you're not talking about the Navajo Code Talkers.
(My bold)
There were Comanche code talkers in WWII. & other languages were also used, in WWI & in WWII. See Code talker - Wikipedia, the free encyclopedia
The Navajo code talkers are the best known in the US.
There are always surprises in the World.