Global language diversity decline

An international research team coordinated by UNESCO and published in *Science* reconstructed 12,000 years of linguistic history, estimating that the Holocene began with roughly 4,500‑6,200 languages and that a peak of tens of thousands (estimates ranging from 20,000 to 75,000) was reached about 1,000‑3,000 years ago. The subsequent decline was driven first by the rise of large states and empires such as Rome and later by European colonial expansion, which spread a handful of dominant languages worldwide. Today about 7,500 languages remain, many of them endangered.

A 2026 follow‑up study using mathematical modelling, anthropology and demography reaffirmed these findings and offered a broader early‑period estimate of 30,000‑75,000 distinct languages. The authors highlighted English, Mandarin, Hindi, Spanish, Arabic and French as the most widespread modern tongues. Claire Bowern (Yale) stressed that languages encode critical knowledge of past societies, while lead author Damian Blasi called the results a reminder of the vast cultural diversity that existed only a few millennia ago. Both studies were published in *Science* and underscore the urgency of preserving the remaining linguistic heritage.