Which language on earth is not man-made

Attending a seminar in Kuala Lumpur and it ended up with an argument with the speaker, who is the PH D holder of Hong Kong University.

He mentioned Robert Philipson and Grin but did not find a solution for the orgainiser or rather for the people of Malaysia.

The seminar is themed 'Linguistic Right in a Multilingual Society' 多元社会的语言人权.

During the Q and A session, I questioned him why he did not mention the Esperanto. Any one who search Robert Philipson and Grin would entail the Esperanto as both, especially Grin has the Economy proposal for the European Union.

What angered me was his reply as :

'I knew the Esperanto language but it is not a nature language.'

Supposingly, he is a follower of Noam Chomsky, Esperanto is not a language, Esperanto estas ne lingvo.

At this moment of time, the linguists in the world who are still arguing between nature and man-make language is an absurd idea. Which language in the world is not first man-make ?

The Latin alphabet and Thai Sanscript and Pali based are borne from the sky and drop to the particular race and says: Hi, this is the language of your race.'

A friend jokingly said, the beast language is not man-make. Got it. It is beast make.

From sound our forefather make to communicate, perhaps, like baby, and thus structurised and made into symbol and passed on to the group of people.

Thus, those linguistic students are they equipped with a new concept and traced back to the cave man communication, if not look at the Chinese symbolised character, you will know that language is made.