What is the Human Language?

"When we study human languaje, we are approaching what some might call the "human essence", the distinctive qualities of mind that are, so far as we know, unique to man." 

 ― Noam Chomsky, Language and mind.

Language is used for billions of people to communicate each second of the day, we talk with a lot of people, in the supermarket, in the bank, in the college, also to use the language without sounds, if we go off the street can see many texts that we can understand. We can produce words, signs and sounds, and that action allow implicate all around the word. But what is that action? We talk about language when each person has the ability to produce a code with a meaning and can understand each other. (Fromkim, Rodman and Hyams, 2003)