What complication did Code Talkers face regarding their own linguistic diversity?

The complications that Code Talkers faced regarding their own linguistic diversity primarily stemmed from variations in dialect within the Navajo language, which at times complicated the clarity of messages being communicated. While the Code Talkers utilized the Navajo language to create a code that was difficult for enemies to break, the existence of different dialects among Navajo speakers posed challenges. These dialectal differences meant that some phrases or terms might not be universally understood among all Navajo speakers, leading to potential misunderstandings or misinterpretations during crucial communications.

The other options address different aspects that could affect communication in general but do not directly relate to the internal challenges the Code Talkers faced within their own language group. Confusion due to multiple languages within military ranks points to an external issue rather than an internal one within the Navajo language itself. Similarly, difficulties in translating English military terms, while a valid concern, do not specifically highlight the diversity of the Navajo language as a complication. Limited knowledge of English among the Code Talkers might indicate a barrier in understanding commands given in English, but this factor does not pertain to the diversity of the Navajo language itself or the resulting complications in communication among the Code Talkers.