Estimates range wildly, from as late as 50,000 years ago to as early as the beginning of the human genus more than 2 million years ago. But words leave no traces in the archaeological record. A team led by Thomas Morgan, a psychologist at the University of California, Berkeley, has attacked the problem in a very different way. Rather than considering toolmaking as a proxy for language ability, he and his colleagues explored the way that language may help modern humans learn to make such tools. Read More
_________________________________________
The Urantia Book teaches about language: Before the extensive dispersion of the Andonic clans a well-developed language had evolved from their early efforts to intercommunicate. This language continued to grow, and almost daily additions were made to it because of the new inventions and adaptations to environment which were developed by these active, restless, and curious people.” Read More

Also consider our Topical Study on Language