Here is a question that no-one will be able to answer....
The oldest known language in Europe is Euskara, it may even pre-date all other known languages. This is the native language of the Basque (Vasco) region in Spain and a part of South West France.
The interesting thing about it is that NOBODY has ever managed to discover its origins. There are subtle hints of Viking in it, Icelandic, and a dozen other possibilities. But it stands alone as a fully self-contained language. It has a complete sentence structure unlike any other language in the world, and the words are punctuated with an inordinate amount of 'X's'.
So far it's origins have totally eluded every attempt at deciphering, the most learned scholars, etymologists, linguists, really have failed. It needs some serious lateral thinking.
Could this be the language of Atlantis?
If anyone has any theories then I would be fascinated to hear them.