Correct pronunciation of phonetics or numerics by any states' controllers is a given. Isn't it?
But what about level 4 english by crew operating in english speaking airspace?
I speak French appallingly and German even worse so who am I to criticise? But ICAO stipulates English as the language for r/t so it's incumbent on native speakers to annunciate proper like or else what chance do our continental chums stand?
Charlie, charlie. SGC