Philip Johnston, a civil engineer for the city of Los Angeles. He was the son of a missionary on the Navajo reservation and had grown up there. He spoke fluent Navajo.
Navajo Language
I believe you are referring to the Navajo Code Talkers. The Navajos were recruited to use their language to speak in code and sent Morse code in the Navajo Code. The Japanese could not recognize the language.
There were no Navajo code "breakers" . That means someone who tries to figure out and unknown code. Native Americans who worked for the American side in World War II were sometimes called "code talkers". They used a substitution code to encode English orders using a native American language, mostly Navajo but other ones were used too.
Code Talkers were specially trained in the art of code talking in the language of the Navajo people. As I understand it, most were of Navajo descent but not all.
no one but them knew the language so it became a useful code language
The Navajo and 11 Hopi soldiers used the the easiest of the Navajo language, to help America defeat the Japanese.
Navajo Indians were used in WW2 to transmit messages in their language which was very effective as a code. It was never broken.
The Navajo Code Talkers were people who used a spoken code in the Navajo language to communicate between US units on the battlefield in the Pacific Theater of War during World War 2.
The military utilized Navajo men who fashioned a secret code from their ancient Navejo language to relay messages of vital importance to the war effort. Navajo language was not decipherable to enemy
The code talkers were native American from the Navajo tribe. They used their native language to send messages that the Japanese couldn't decode or understand.
You must be thinking about the Navajo code talkers
Navajo is a very difficult language and impossible for the Japanese to decipher