Being bilingual can help keep your brain in good condition

Steffanie Zazulak
A silohuette of a side profile of a womans head inside her head space is a ocean sunset

Learning and understanding a new language is one of the most challenging things that your brain can do. But as well as the advantage of acquiring another language, it appears that the effort of giving your brain a good workout today by being bilingual could keep it in better condition in later life.

Research led by Dr. Daniela Perani, a professor of psychology at in Milan, found that people who speak two or more languages seem to weather the ravages of Alzheimer’s disease better compared to people who have only mastered one language. Alzheimer’s is a progressive mental deterioration that can begin in middle or old age due to generalized brain degeneration.

The study involved 85 people with Alzheimer’s – half of whom spoke both German and Italian and half who spoke only one language. The researchers found that bilingual patients had greater connectivity in key brain areas. This was especially in the part of the brain that governs “executive control” – a set of necessary behavioral cognitive processes that include problem-solving, working memory, reasoning and attentional control. The study also noted that the bilingual Alzheimer’s patients showed less severe symptoms of the disease.

The study concluded: “Our findings suggest that the effects of speaking two languages are more powerful than both age and education in providing a protection against cognitive decline.”

Bilingualism and the brain

Although Alzheimer’s disease is currently incurable, the study supports a popular theory that people who have higher levels of education function longer with little manifestation of the illness. Part of the reason why bilingual brains may be better at resisting Alzheimer’s could be due to a lifetime of switching between languages daily.

Learning and speaking more than one language changes how the brain carries out tasks that require focus and concentration on a certain piece of information without being distracted. It can also increase the density of white matter (connections) in the brain, meaning that there are more connections between brain parts, thus making this part of the brain more resistant to degeneration.

This is supported by a study conducted by a team led by Professor Ana Inés Ansaldo at the , which suggests that bilingual people have more robust and more efficient brains compared to those who only speak one language. This is one of the reasons why a bilingual brain can be a buffer against aging and dementia.

They recruited elderly people, half of whom spoke only one language and the other half who had learned a second language between the ages of 11 and 18. All performed equally well on a task that involved focusing on an object's color while ignoring its position, but brain scans revealed a big difference in how they processed the task.

“While bilinguals were recruiting very specific brain areas and a small number of areas to perform the task, monolinguals were recruiting a much larger number of areas that were consuming much more resources. And the networks they were using were very, very complex,” says Professor Ansaldo. “That led us to think that the bilingual brain was more efficient in terms of the amount of resources that bilingual people require to do complex tasks as opposed to the monolingual brain.”

The study concludes that bilingualism shapes the brain in a different way or how people approach complex tasks. It could be because bilinguals must inhibit the language they are not using to focus on the one that they are using.

Read our other blog post on about how language learning can help your mental health and wellbeing.

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  • A teacher stood at a table of students helping them

    Tips for keeping learners studying over the holiday season

    By Nicolas Chaparro
    Reading time: 3.5 minutes

    Nicolas Chaparro is a Colombian language teacher with a bachelor's degree in basic education, specializing in humanities and languages. After spending five years working as a systems technician, he discovered the potential of technology to enhance learning, which ignited his passion for dynamic, tech-driven education. He has the privilege of working at one of Colombia's most prestigious English institutions, where he currently leads a team focused on education, creativity and motivation.

    The holiday season is a magical time and the perfect moment to spark a teacher's creativity. I've always believed that learning a language isn't just about studying—it's about living it. As a learner, I loved the resources my teachers and institutions provided, but what truly captivated me was the opportunity to engage with the world using the language skills I had acquired.

    As a teacher, I strive to give my students that same experience. I didn't expect the holiday season to become the perfect setting to turn my teaching philosophy into reality. This blog post shares a personal story of how I used a creative activity to keep my students learning and practicing English during the holidays with the support of the Global Scale of English (GSE).

    The challenge I faced: Mixed levels and ages

    The activity I designed, Christmas Carols, presented two main challenges:

    1. Diverse proficiency levels: My group included students ranging from beginners to advanced learners, all participating in the same activity. I wanted to have them all working together; that's what language means to me.
    2. Varied age groups: The students also spanned different age ranges, which required an effective approach to engage everyone. It was a Christmas gathering meeting with all the institution's students.

    Basic students worked on identifying vocabulary that is similar to their native language and then used it in a short text. Intermediate students solved riddles to guess words that could be included in the lyrics. Advanced students completed questionnaires to build sentences and find synonyms to refine the text. The carol was divided into three sections: the first paragraph was for basic students, the second for intermediate students and the third for advanced students. I also included French students in the activity, which was designed for both languages.

    After the students completed their tasks in separate groups, I mixed them so they could explain the vocabulary they had learned to one another. To facilitate communication without relying on Spanish, I used pictures and Christmas props to help them express themselves visually.

    Finally, we all came together and sang the carol as one group.

    Turning challenges into opportunities with the GSE

    For me, a successful language activity needs three essential components: clear instructions, engaging resources and opportunities for interaction. With these principles in mind, I crafted an inclusive and dynamic activity, using the GSE to guide my planning.

    Step 1: Defining the goal

    I realized that most of my students didn't know specific Christmas-related vocabulary or any traditional English carols. This activity was also an opportunity to learn by myself and then share with them. This gap was my opportunity to introduce them to the holiday spirit in English.

    Step 2: Planning with the GSE

    I identified suitable goals for each proficiency level using the GSE Learning Objectives. These objectives helped me design tasks that targeted key skills—listening, speaking, reading and writing—while considering the ages and abilities of my students.

    Step 3: Preparing a scavenger hunt

    To make the activity interactive and fun, I organized a scavenger hunt. Students had to solve riddles and follow clues to find words essential for completing a Christmas song. The GSE objectives ensured that the tasks were appropriately challenging for each level.

    Step 4: Pairing students effectively

    Knowing my students well, I paired them strategically based on their proficiency and age. This pairing encouraged collaboration and allowed them to support each other throughout the activity.

    Making language visible and memorable

    One of my priorities was to make the language come alive. I brought visual aids like cards, games, and even a Christmas tree and a nativity scene—elements that most students recognized but had never explored in English. These visuals became valuable tools for teaching vocabulary in a tangible, engaging way.

    To add another layer of interaction, I used my guitar to sing along with the students. By the end of the activity, not only were we singing, but they also understood the meaning behind every word. Watching them take pride in their learning was incredibly rewarding and I knew this vocabulary wouldn't stop there; they would take it home and make it real for them, for the season, for their life.

    Reflections and an invitation

    This experience reminded me of the power of teaching through real-life experiences. Holidays provide a unique opportunity to teach without teaching and to help students study while living the language. Tools like the GSE make it easier for us as educators to plan meaningful and impactful activities.

    My invitation to fellow teachers is twofold:

    1. Explore the GSE resources to enrich your teaching strategies.
    2. Share your ideas and activities with the teaching community. Together, we can create opportunities for our students to use the language in real and virtual contexts that inspire learning and cooperation.

    Let's make 2025 the year we bring language to life in every classroom.