valo_j, I have a question, if I may ask you...
I've been told that the in the Chinese language, pronunciation and tone are very critical. The same word can have a very different meaning if spoken even a little differently.
Are any of your radio communicatons done in Chinese, and if so, does this present any problems? (We all know that sometimes poor radio reception can make it difficult to understand some words. I can only imagine that the issue would be made worse if the speaker's tone were important too.)