"Does the history of our languages match the history of our genes? Charles Darwin thought yes, others said no. An interdisciplinary team of researchers from the Max Planck Institute for Evolutionary Anthropology, the University of Zurich and Harvard University has put together GeLaTo, a global database linking linguistic and genetic data. They found a large number of matches but also widespread and systematic mismatches."
https://www.mpg.de/19524042/1121-evan-g ... r-150495-x
"Most mismatches result from populations shifting to the language of a neighbouring population that is genetically different. The case of people who maintain an original linguistic identity despite genetic assimilation with their neighbours is rarer, but does occur as well. For example, the Hungarian people are genetically similar to their neighbours, but their language is related to languages of Siberia.
“Once we know where such language shifts happened, we can try to answer why they happened”, explains Russell Gray, Director of the Department of Linguistic and Cultural Evolution at the Max Planck Institute for Evolutionary Anthropology and initiator of the project."