Summary: A new study utilized artificial intelligence and ultra-sensitive magnetic brain imaging to map neuro-aging. By tracking a cohort of multilingual individuals from the Basque region of Spain, the team discovered a striking, direct gradient between language count and neurological preservation.
Speaking two languages shaved approximately 6 years off a participant’s biological brain age, while those mastering four languages possessed brains that appeared an astonishing 13 years younger than their actual chronological age.
Key Facts
- Building the Neural Timepiece: To construct a highly accurate baseline for normal cognitive decline, the researchers deployed AI to analyze the MEG brain connectivity profiles of a massive training group consisting of 728 individuals spanning a wide age spectrum.
- The Basque Multilingual Matrix: The team then applied this validated “brain aging clock” to a test cohort of 144 individuals from the Basque country. This unique population was chosen because participants naturally juggle between one and four distinct languages, including combinations of Spanish, Basque, French, and English.
- The Multilingual Gradient Unmasked: When the AI cross-referenced chronological ages with structural brain signatures, it unmasked a step-by-step biological fountain of youth:
- Bilinguals (2 Languages): Brains appeared 6 years younger than normal baselines.
- Trilinguals (3 Languages): Brains appeared 7 years younger than normal baselines.
- Quadrilinguals (4 Languages): Brains appeared an incredible 13 years younger than normal baselines.
- Depth of Experience Matters: Dr. Amoruso emphasizes that this neurological protection is not a binary, all-or-nothing switch. The protective delay in brain aging runs along a clear gradient tied directly to high language proficiency, high fluency, and the early childhood acquisition of a second language.
- Managing Linguistic Rivals: The research team points out that the brain works hardest when it has to constantly suppress one language to speak another. They plan next-phase trials to investigate whether speaking languages that are highly similar (like Spanish and Italian) triggers an even larger brain-youth effect, as managing closely related vocabulary requires significantly higher levels of active cognitive control.
- The Prevention Horizon: While factors like education, sex, and age were rigorously controlled, the team is expanding their scope to track patients with neurodegenerative diseases like Alzheimer’s. The goal is to see if lifelong multilingualism can preserve functional independence even after physical pathology begins damaging brain cells.
Source: FENS
People who speak more than one language seem to have younger brains, according to research presented at the Federation of European Neuroscience Societies (FENS) Forum 2026.
Our brains are made up of billions of nerve cells which need to communicate with one another. As we age, the connectivity in our brains tends to deteriorate and, as a result, our memory and the speed of our thinking also decline.
The new research found that the more languages people speak, the younger their brains appear. Learning an extra language at a younger age and learning to become highly fluent in another language also seem to slow brain ageing.
The research was presented by Dr Lucia Amoruso from the Basque Center on Cognition, Brain and Language, San Sebastián, Spain, who worked with a team from the Latin American Brain Health Institute at the Universidad Adolfo Ibañez, Chile, the Cognitive Neuroscience Center at the Universidad de San Andres, Argentina, and the Global Brain Health Institute at Trinity College Dublin, Ireland.
The researchers recently published a study showing that in countries where people typically speak more than one language, people seem to age more slowly. In the new study, the researchers carried out detailed analysis on a group of people from the Basque region of Spain who spoke between one and four different languages including combinations of Spanish, Basque, French and English.
They began with a group of 728 people to create a ‘brain ageing clock’. They used a technique called magnetoencephalography which measures brain activity by the faint magnetic fields produced when brain cells are active. The researchers used artificial intelligence to process data on brain activity in people of different ages to show what is a normal level of brain connectivity at any given age.
Then the team used this clock to gauge the ‘brain age’ of a second group of 144 people.
When they compared people’s real age with the age of their brain, they found that those who spoke two languages had brains that appeared around six years younger than those who spoke only one language. For people who spoke three languages, their brains were around seven years younger, and for those who spoke four languages, their brains were around 13 years younger.
Dr Amoruso said: “In simple terms, people who spoke more languages tended to have brains that looked younger than expected for their chronological age. The effect was not only related to the number of languages spoken. Higher language proficiency and earlier acquisition of a second language were also associated with more delayed brain ageing. 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.”
The researchers took account of factors such as people’s age, sex and education, but caution that they cannot rule out the potential influence of other factors that may have an impact on the brain, such as lifestyle and social engagement.
Dr Amoruso and the team now hope to carry out similar work in people with neurodegenerative conditions, such as Alzheimer’s disease, where brain ageing and resilience are especially important. They also plan to look at whether speaking two or more languages that are very similar could have a bigger effect on the brain, as managing closely related languages may require greater language control.
Professor Christina Dalla from the National and Kapodistrian University of Athens, Greece, is chair of the FENS Forum communication committee and was not involved in the research. She said: “We know that many factors can influence our brain health and mental abilities as we age. For example, we know that not smoking, eating well, social and artistic engagement, as well as being active, can help. How we use our brains throughout life can also have an impact, especially if we engage in effortful learning that activates our brain.
“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. There are many good reasons for learning another language at any age – social, cultural and for the health of your brain – so we should support language learning at school and throughout life, even if it’s hard.”
Key Questions Answered:
A: Think of your brain like a high-performance muscle. When you speak only one language, your brain retrieves words easily without any internal competition. But when you are multilingual, all your mastered languages are constantly active at the exact same time inside your mind. Your brain has to work incredibly hard to suppress the languages you don’t need so you can speak the one you do. This intense, continuous mental effort keeps the brain’s communication pathways heavily active, reinforcing cell connectivity and delaying the natural fraying that occurs as we age.
A: A brain aging clock is an artificial intelligence algorithm trained to recognize what a healthy brain looks like at every stage of life. The researchers used a highly advanced brain-mapping machine called a magnetoencephalograph (MEG) to record the microscopic magnetic fields created by active brain cells in 728 people. The AI studied these patterns to map out a “normal” baseline of how brain connectivity naturally drops over the years. When they plugged the multilingual group into this clock, the AI discovered that their internal neural wiring matched the profiles of people who were up to 13 years younger.
A: It is absolutely worth it at any age. While Dr. Amoruso’s study notes that the absolute strongest, 13-year anti-aging effects happen when you learn languages early in childhood and achieve deep fluency, learning an extra language later in life still provides immense benefits. Professor Christina Dalla, an independent expert from FENS, emphasizes that engaging in “effortful learning”, forcing your brain to tackle a difficult task like a new grammar system, is exactly what sparks neuroplasticity. No matter how old you are, picking up a new language is a phenomenal workout to keep your mind sharp and resilient.
Editorial Notes:
- This article was edited by a Neuroscience News editor.
- Journal paper reviewed in full.
- Additional context added by our staff.
About this multilingualism and brain aging research news
Author: Kerry Noble
Source: FENS
Contact: Kerry Noble – FENS
Image: The image is credited to Neuroscience News
Original Research: The study will be presented at FENS Forum 2026
