This is an interesting concept that my wife I were just discussing on Friday. We were coming back from somewhere and she made a comment about something that was said on the scanner and asked me whatever happened to the "good old '10' codes". Well, I explained there was a slow and steady movement away from the use of codes and jargon so that plain language was used and therefore when inter-operations incidents happened there would be no confusion as to what was meant.
She looked at me and blandly said "Really?", and I said "Sure". Her reply to me was "That's clear." At that point I realized she was pointing out a problem, no matter what the plan is, jargon still happens. In this instance she was poking at the local law enforcement (Houston Metro area) who have traded "10-4" for "That's clear." For example:
Dispatcher - "11-Edward-44, are you clear?"
11E44 - "I'm clear"
Dispatcher - "That's clear"
This led me to consider all the jargon that is still used in some places and probably will continue to be used despite efforts to do away with them. Some examples that come to mind in regards to fire operations are: the aforementioned "Box" and "Box Alarm"; "Tap Out"; "PAR"; although plain language, the still stilted "Copy that"; and of course there are more that refer to different situation and tools. I think, despite the prevalence of the incident command system (ICS) use, we have a long way to go before plain language becomes plain language.