It makes sense that pilots and air traffic controllers speak a common language, and though it hurts my Irish heart to say it, it makes sense that English be that language as it is the most widely spoken language in the world (outside China).

That's a question of safety and practical necessity.

"Fore" is the only word golfers need to know in common - though in the case of some golfers I suppose a compulsory radio link to air traffic control might be justifiable ...