New research suggests that human language evolved through ancient genetic systems that predate modern humans. Scientists say some of the most important DNA regions linked to language are among the oldest parts of the human genome.
A team led by Jacob Michaelson at the University of Iowa examined how different regions of DNA relate to language ability. Their findings were published in Science Advances.
Ancient DNA regions show the strongest influence
Instead of focusing on single genes, researchers grouped parts of the genome based on their evolutionary age. They then analyzed which regions were most closely linked to language performance.
The results pointed to a group of ancient DNA regions known as HAQERs. These regions evolved before modern humans split from Neanderthals.
Although HAQERs make up only about one-tenth of one percent of the genome, they appear to have a strong impact on language ability. Researchers said these regions “pack the most punch” when it comes to explaining differences in how people communicate.
Findings confirmed across multiple populations
To test the results, researchers studied the genomes of 350 elementary school students in Iowa. The children completed 17 language tests over several years, from kindergarten through fourth grade.
Scientists found that tiny, ancient DNA regions called HAQERs, not just single genes like FOXP2, play a major role in how language develops.
Language isn’t controlled by one gene. It’s the result of complex genetic networks built over millions of years. pic.twitter.com/s6EWtzOdeD
— Tom Marvolo Riddle (@tom_riddle2025) April 23, 2026
The analysis showed that variations in these ancient regions tracked closely with differences in language skills. Students with certain patterns performed differently in areas such as vocabulary and comprehension.
The team then confirmed the findings using data from more than 100,000 individuals. These included participants in the UK Biobank and SPARK. The same pattern appeared across different groups, strengthening the results.
Gene regulation explains complex language traits
Researchers say HAQERs are not genes. Instead, they act as regulatory elements that control how and when genes are activated.
Michaelson compared them to “dials” that fine-tune gene activity. Genes such as the FOXP2 gene produce proteins that act like “hands” adjusting those dials across the genome.
This interaction suggests that language evolved through coordinated genetic regulation. Small changes across many regions combine to shape how individuals speak and understand language.
Earlier research had focused heavily on FOXP2 as a key language gene. Scientists now say that view is incomplete. Language appears to depend on networks of genes and regulatory systems rather than a single genetic factor.
Study raises questions about early humans
The findings also offer insight into human evolution. Scientists do not know what kind of language Neanderthals may have used. However, the presence of these ancient genetic regions suggests they likely had the biological capacity for language.
Some experts urge caution. Mark Pagel, an evolutionary biologist at the University of Reading, said the regions may have developed during a period of rapid brain growth in early humans. Their original role may not have been limited to language.
Language is rooted deep in human evolution
Researchers say the study highlights how deeply communication is embedded in human biology. Ancient genetic systems continue to shape how people speak and understand each other today.
Scientists say more research is needed to understand how these regions interact with brain development and the environment. For now, the findings suggest that human language evolved over millions of years through complex genetic systems, not a single gene.
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