Today at work I started a topic that made everybody to think for some time. Even though we never got an answer but we had a good discussion. We where a 5 of different nationality, Me a South African, Romanian, Indian, Philippines and Thailander. The first thing I did when coming home I ask Google search and this is what I found.
Ergo, Tamil (which descends from Old Tamil, which descends from Tamil-Kannada, which descends from Tamil-Tulu-Kannada, which descends from Proto-Southern-Dravidian which descends from Proto-Dravidian) is not the world's oldest language, not its first language and was not the only language spoken in the world at any ...
Tamil
First millennium BC
Date Language Attestation
c. 260 BC Middle Indo-Aryan (Prakrit) Edicts of Ashoka
c. 200 BC Tamil cave inscriptions and potsherds in Tamil Nadu
2nd century BC Meroitic graffiti on the temple of Amun at Dukki Gel, near Kerma
c. 100 BC Celtiberian Botorrita plaques
Of these languages which have a written record, only a dozen or so have some record that extend to more than 2000 years. Tamil, Greek, Chinese, Latin, Sanskrit, Hebrew are some of them. One of the languages that could have existed for a long time is Tamil.
What is the world's oldest language still spoken today? - Quora
https://www.quora.com/What-is-the-worlds-oldest-language-still-spoken-today-1
This is interesting, now I have an answer.