Many cultures, based mostly on arrogance and pride, and referring to loose associations of words between neighboring nations, claim their own culture to be THE original.
However, the first language was spoken by Adam... which must have been taught to him by God... Well, maybe their conversations were instant, like reported by those who have had NDEs and gone temporarily to Heaven...
So, the first language is the one spoken by Adam and Eve after they were evicted from the Garden of Eden. This is situated somewhere in the Middle East, which was green in those days.
It is interesting to mention that all babies make all the basic sound components (phonemes) of all the languages in the world. Even the clicks and clucks of some African languages are made by babies in India, Canada, Russia, and Saudi Arabia- in every nation.