What were the first human languages?

Answer 1

The current linguistic theory identifies the first human language as Proto-World, or Proto-Human, and may have been spokean as far back as 200,000 years ago.

Second answer

The very first human language was most likely gestural in nature. This is because chimps, our closest genetic cousins, communicate more through visual and tactile cues like facial expressions, hand and body gestures, and bodily contact than they do with vocalizations. The area of the brain that controls hand gestures also controls the tongue. Young autistic children who cannot speak have gained the ability after learning American Sign Language. People born with a mutated version of FOXP2, the gene in the brain associated with speech, have problems talking because they do not have proper control of their tongues and mouth muscles. This gene is believed to have come about 50,000 years ago, which would have allowed humans to finally talk. For a more detailed description, see here (How did language evolve). See also the book Next of Kin (1997) by Roger Fouts.

The very first spoken human language was most likely a click language akin to that spoken by the !Kung San of Africa (! = click). This is because the language is so unlike anything else spoke in the world, which points to its antiquity. Also, the !Kung people have the oldest genetic strain of human DNA in the world. For more, see the book Before the Dawn (2006) by Roger Fouts.