There is no fossil of a conversation
Spoken language is behaviour, so it does not fossilise. Researchers infer capacity from vocal anatomy, hearing, brain organisation, genetics, symbolic artefacts and comparisons with other primates.
Important neural ingredients are older than our species
Comparative brain imaging shows chimpanzees possess a weaker version of the long arcuate-fascicle connection linking regions involved in human language. That supports gradual strengthening of inherited primate circuitry rather than an entirely new language network appearing from nothing.
Neanderthals complicate a recent-origin story
Neanderthals had many components relevant to speech and symbolic behaviour and shared much of our genetic and anatomical machinery. That does not prove they spoke a modern human language, but it makes a very recent Homo sapiens-only origin harder to assume.
Language probably evolved in stages
Vocal control, shared attention, gesture, learning, symbolic reference and hierarchical combination need not have appeared simultaneously. Different components could have been assembled and elaborated across hundreds of thousands or millions of years.
Research record
Becker et al. (2025) — Chimpanzee arcuate fascicle as a precursor of the language networkPeer-reviewed · open sourceBecker (2025) — Studying language evolution through comparative tractographyReview · open sourceFitch (2016) — The evolution of speech and languageReview · open sourceWhen Did Human Language Begin?
Direct answer: We cannot date the beginning of language precisely. Its neural and communicative precursors are ancient, and complex human language most plausibly emerged gradually rather than in one identifiable prehistoric moment.
Any confident claim for 'the first language' at a specific archaeological date exceeds the evidence. Evolutionary continuity is increasingly well supported; the timing of fully modern language remains open.