The ability to produce and interpret language is a biological adaptation of the human race, and therefore limited by our physical ability to create symbols and our mental ability to understand them.
Language is nothing by itself.
Only the culture where it is used can associate meaning with sound, giving the language substance. Language as communication may offer many advantages. Namely it is by far the best alternative for communication. Other ways we communicate are with hand movements and expression, proximity to others, touching others, time, and our physical appearance. I think even the materail objects we surround ourselves with are intended to relay something about us.