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DID CROMAGNON SPEAK AN INDO-EUROPEAN IDIOMA ?????????????? NO, CRO-MAGNON was living 30 000 years ago, and IndoEuropeans arrived 3000 years ago in the SouthWest of France ; thus Cro-Magnon did not speak indo-european idioma. Because Altamira cave (in Basc country) and Lascaux cave (in Périgord) are very similar, an hypothesis is that Cro-Magnon spoke a primitive Basque.