Good news for anyone who has ever suffered through a language class: that Duolingo owl might actually be saving your brain. A new study presented at the Federation of European Neuroscience Societies conference in Barcelona claims that learning another language could slow brain aging by up to 13 years.

The research, conducted by scientists in Spain, Chile, Argentina, and Dublin, used magnetoencephalography to measure brain activity in 728 people from the Basque region - an area known for its high levels of multilingualism, where residents often speak Spanish, Basque, French, and/or English. The team then used AI to crunch the data and establish a baseline for normal brain connectivity at any given age. A second group of 144 people - evenly split among speakers of one, two, three, or four languages - were scanned and compared.

Results showed that bilinguals had brains appearing about six years younger than monolinguals. Those who spoke three languages had brains about seven years younger, and quadrilinguals enjoyed a whopping 13-year brain age reduction. Dr. Lucia Amoruso from the Basque Center on Cognition, Brain and Language noted that the effect wasn't just about the number of languages but also proficiency and how early you started. "This suggests that multilingual experience matters as a gradient: it is not simply about being bilingual or not, but about the depth and duration of language experience," she said.

Before you start frantically downloading language apps, two caveats: The researchers accounted for age, sex, and education, but couldn't rule out lifestyle and social engagement as factors. Prof. Christina Dalla from the National and Kapodistrian University of Athens cheered the findings, saying, "There are many good reasons for learning another language at any age - social, cultural and for the health of your brain." Meanwhile, Prof. Eef Hogervorst from Loughborough University urged caution, noting that multilingual people might simply have healthier lifestyles or better access to brain-protective activities like reading or playing musical instruments. So, maybe learn that language, but also, maybe go for a walk.