How much aerodynamics should pilots know?
The language problem is even worse when using instant communications.
I could write down a snapshot of my thoughts and send it to the whole world in a very short period of time.
That causes problems. If I talked to you face to face, I would see your reactions and I would interact and explain what I mean if required.
It is not possible to do that with the new media types. The modern communication media causes new problems.
Cheers,
Ikaros