Learning and speaking multiple languages can significantly slow down how fast the brain ages, according to new research. A study presented in July 2026 found that people who speak two languages had brains that appeared about six years younger than those who speak only one. Those who spoke four languages showed brains that seemed to be 13 years younger.This suggests that actively using more languages provides a strong protective effect against cognitive decline.[theguardian+2]
Speaking More Languages Keeps Brains Younger
The findings come from a study presented at the Federation of European Neuroscience Societies (FENS) conference in Barcelona, Spain.Researchers from Spain, Chile, Argentina, and Ireland collaborated on the project.They looked at brain activity in hundreds of people with different language abilities.[theguardian+6]
The study found a direct link between the number of languages a person spoke and how young their brain appeared. People speaking three languages had brains that looked around seven years younger.This effect was not just about knowing another language, but also about how well someone spoke it and how early they started learning.[theguardian+3]
Dr. Lucia Amoruso, from the Basque Center on Cognition, Brain and Language, explained the results. "In simple terms, people who spoke more languages tended to have brains that looked younger than expected for their chronological age," Amoruso said.She added that higher language skill and earlier learning of a second language also helped delay brain aging.[theguardian+5]
How Multilingualism Protects the Brain
Scientists believe that constantly switching between languages acts like a workout for the brain. This mental exercise strengthens the brain networks used for attention and control.This continuous stimulation helps build what researchers call "cognitive reserve."[medicalnewstoday+9]
Another large study published in November 2025 in Nature Aging supported these findings.It analyzed data from over 86,000 healthy individuals aged 51 to 90 across 27 European countries.This research found that multilingual speakers were about half as likely to show signs of accelerated aging compared to those who spoke only one language.[medicalnewstoday+10]
Professor AgustÃn Ibáñez, a co-author of the Nature Aging study, highlighted the protective role of multilingualism. "Our results provide strong evidence that multilingualism functions as a protective factor for healthy aging," Ibáñez said. He noted that using languages regularly makes you manage attention and switch between rules, which strengthens brain networks that can weaken with age.[medicalnewstoday+1]
Broader Benefits and Future Implications
The benefits of speaking multiple languages extend beyond just slowing brain aging. Research also shows that being bilingual can delay the onset of dementia symptoms by about four years. Thissuggests that multilingualism could help people maintain their cognitive abilities longer, even if they develop age-related brain conditions.[uclahealth]
Ellen Bialystok, a psychology professor who has studied language effects on the brain for decades, emphasized the constant mental stimulation. "If you are constantly using your brain for difficult, engaging and stimulating challenges, your brain will be healthier," Bialystok told The Washington Post. She explained that learning a language provides intense and constant mental activity.[washingtonpost+2]
Professor Christina Dalla, a neuroscientist not involved in the FENS study, commented on its importance. "This study suggests that learning a second, third or fourth language could help our brains to stay younger for longer, and the earlier we start, the better," Dalla said. She added that there are many good reasons to learn languages, including social, cultural, and brain health benefits.[washingtonpost+4]
Researchers accounted for factors like age, gender, and education in their analysis. However, they noted that other influences like lifestyle and social engagement might also play a role in brain health. The evidence strongly suggests that the more languages a person learns and uses, and the earlier they begin, the greater the protection for their brain as they age.[atanet+4]
