Taking the definition of language a symbolic way to represent an object, is there any explanation for its origin? Is it dependent of any part of the brain?
Scientific info about this issue will be welcome.
The origin of language may be as much structural as cerebral. I think the key words are larynx and hyoid bone.
I included a link below, but you should really compare several sources, because there are a lot of details, and science's understanding of human evolution is constantly evolving itself.
For example, there's genetic evidence that all living humans are descended from a single African male sometimes called "Scientific Adam." No one knows exactly what made this individual so special, but there's speculation that he might have been the first to really master language. But that might be nothing more than speculation, and I'm just throwing it in as an anecdote. Lots of stuff has been written on the topic.
I believe language is linked with a certain part of the brain, but I don't know any specifics.
P.S. I might add that archaeological evidence suggests that modern humans (Home sapiens) made far greater use of symbols, including art, than Neanderthals did. This is believed to derive from the fact that our species had more advanced language skills, which translated into a better grasp of symbolism.