Human evolution next part is express their emotions and feelings in a art form like drawings. Man will go for hunting for fruit in trees. Meanwhile Man begins to speak.
Every Landscape have an forest and Every forest have homo sapiens like creatures. According to me languages are born in everywhere in the world but According to the research of many scientists have concluded according to their opinion they said many languages are born thousands of years ago.
Example:
Seven oldest surviving languages in the world.
Tamil: Origin (according to first appearance as script) - 300 BC. ...
Sanskrit: Origin (according to first appearance as script) - 2000 BC. ...
Greek: Origin (according to first appearance as script) - 1500 BC. ...
Chinese: Origin (according to first appearance as script) - 1250 BC.
But according to me all languages are spoken by human may or may not in the same year. This is because all man will speak any language in a same age like 2 or 3 yrs of birth
All language difference lies between when it was manuscript.
Languages are born to express Man feeling and emotions. At first Man's feelings are expressed in Art and music form when he gets a ability to speak he teaches that to his children in a writing form. This is how an language have been evolved.