Horse training jargon. Clear or confusing?

Mystical, humorous or deliberately elusive – the terms we use in the horse business can leave a rider scratching her head. As a young rider, I was a coach’s worst nightmare – “What do you mean by that?”, I’d ask.
I rarely got a meaningful answer.
No doubt, jargon adds some comic relief to the conversation. Some horse trainer lingo is just – funny!
But, are the terms we use meant to CREATE mystery or to UNCOVER and UNPACK the mysteries of humans working with horses?
Training a non- English- speaking horse partner is complicated enough without including unclear terms which train riders to give unclear signals and horses to be clearly stressed out! If we can’t describe our aids in such a way that someone who’s never ridden could understand, chances are the aid is fuzzy to the horse too!