Here in Canada the verbiage changed from 'Crash, Fire, Rescue' to 'Airport Rescue Fire Fighting' a few years ago (maybe a decade or so). You'll still hear CRF said during training from some of the older pilots, even though we've made a similar push to sticking as closely to ICAO phraseology for everything. We've been assured that despite one or two cases to the contrary, MAYDAY and PAN PAN will be understood worldwide and once you tell ATC where you are going, the appropriate services will be activated.
"Roll the trucks" sounds like something out of Smokey and the Bandit. I like it.