“the method of human communication, either spoken or written, consisting of the use of words in a structured and conventional way.”
Of the above sentence ‘Human communication’ is of great importance.
Since Humans are different, communication should also be different. So each has a language of their own.
In order to use a language, we have to do the following
Eg. Using any language to explain the above to a year old misses the communication part. So we have to learn their language to communicate.