Had some neat properties at the time though, like speeding up coded communications, and: "a speaker who has acquired a language during their childhood sounds di

Had some neat properties at the time though, like speeding up coded communications, and: "a speaker who has acquired a language during their childhood sounds distinctly different from a person who acquired the same language in later life, thus reducing the chance of successful impostors sending false messages" https://en.wikipedia.org/wiki/Navajo_code_talkers#Cryptographic_properties https://en.wikipedia.org/wiki/Navajo_code_talkers#Cryptograp...