to bArt2
i never met any *a couple of spins *or *bring the speed down*in the phraseology-sounds like a James Bond talking on the frequency.Not professionally,let alone saying you were talking to a crew that probably only has ICAO English level 4.
Ur trainee was getting irritated?Show him the documents.
And you probably noticed-was no problem at all for the crew to understand what he was saying when started to use aviation language.