What was the code created by the Navajo Code Talkers based on?

The code created by the Navajo Code Talkers was based on simplified words and phrases in the Navajo language. This decision was pivotal because the Navajo language is complex and not widely understood outside of the Navajo community, making it an ideal choice for secure communication during World War II. The Code Talkers developed a unique code that utilized Navajo words to represent military terms and concepts, ensuring effective communication that was almost impossible for enemy forces to decipher.

The use of Navajo not only leveraged the richness of the language but also played a crucial role in U.S. military operations in the Pacific Theatre. The simplicity of the words and phrases made them easier to learn and transmit quickly by radio operators. While the other options mention different languages or terminology, they do not accurately reflect the linguistic foundation of the code, which was specifically rooted in the Navajo language.