I have no concerns with the use of military gibberish being used within that civil airspace released to military use/control. That said, I have real concerns when that same military gibberish is used in normal national or international civil airspace. It is professional and safer to use the applicable procedures and communication norms for the airspace in which you are operating.
It is noted also that some civil operators sound like they are chatting away on Childrens Band out in the Baja somewhere instead of employing standard ICAO procedures. As the world knows, if certain things are done a particular way in the US (or France), they are right and everyone else is wrong.
Just ask them.
CC