Language is absolutely fascinating. It is a definition of a culture and a reflection at the same time. Word meanings change from 1 area to another. Inflection and body language change meanings. Personal history changes meanings.
One has to tailor one's vocabulary to one's listeners. You have to keep in mind country of origin, profession, and education. I don't believe that one can learn a language perfectly because one's command of a language will always be relative to one's listeners.
I went to a play about Christ in Mexico. All the actors spoke Andalusian Spanish but Christ spoke Castillian. I'm sure that it was supposed to imply something but, it was lost on me. I speak both.
English is comprised of about 23 languages. It is the black sheep of the Germanic family but Londinium was founded by the Romans. We adopt whatever we need. Then, we butcher as needed. We went from gay and carefree to gay pride,,, from the holocaust at the fire-bombing of Tokyo to the holocaust at Dachau.
We decimated the trees until they were all gone. We all know that moot means unimportant. We learned to deplane irregardless of the problem. We invented CB radio jargon and ebonics. We lrnd to txt r frnds. weevenlearnedtoreadwithoutspaces. We tried Esperanto.
What does the future hold for language? Who knows? Josephson at Cambridge proved quantum tunneling in sapient species. Maybe direct mind contact will be augmented to usefullness. Rupert Sheldrake's work shows great possibilities for learning without language.
They've even taught Gorillas to "sign". They in turn have taught their offspring.
I think the next big step will be to straighten out the alphabet. The oriental pictographs are just too cumbersome. Maybe we'll get a fusion of the Greek and Cryllic. I'm sure that the kids will pick it up in a couple of weeks.