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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    1. English

    Speakers: Approximately 1.5 billion

    Native speakers: Around 360 million

    Regions: Widely spoken in the Americas, Europe, Africa, Asia and Oceania.

    Highlights: English is the most widely spoken language worldwide when combining native and non-native speakers. It's the primary language in countries like the United States, the United Kingdom, Canada and Australia. English is the dominant language in international business, science and technology.

    2. Mandarin Chinese

    Speakers: Over 1.1 billion

    Native speakers: About 920 million

    Regions: Mainly in China, Taiwan and Singapore

    Highlights: Mandarin is the language with the largest number of native speakers. It's one of the six official languages of the United Nations and has a significant cultural and historical importance.

    3. Hindi

    Speakers: Around 600 million

    Native speakers: Approximately 341 million

    Regions: Predominantly in India and Nepal

    Highlights: Hindi is predominantly spoken in India and Nepal, with approximately 341 million native speakers. It is one of the official languages of India and is spoken by a large portion of the Indian population. It has numerous dialects and is written in the Devanagari script.

    4. Spanish

    Speakers: Approximately 560 million

    Native speakers: About 460 million

    Regions: Spain, Latin America and parts of the United States

    Highlights: Spanish is the official language in 21 countries and is widely spoken in the Americas. In many of these countries, Spanish serves as the national language, playing a crucial role in government, education and media. It’s known for its rich literature and cultural heritage.

    5. French

    Speakers: Around 280 million

    Native speakers: About 77 million

    Regions: France, parts of Africa, Canada, Belgium and Switzerland

    Highlights: French is another of the six official languages of the United Nations. It's widely used in international diplomacy and has a significant number of speakers in Africa due to France's colonial history.

    6. Arabic

    Speakers: Approximately 270 million

    Native speakers: Around 310 million

    Regions: Middle East and North Africa

    Highlights: Arabic is a central Semitic language that is the liturgical language of Islam. It has many dialects, with Modern Standard Arabic being used in formal settings and media. Arabic has numerous spoken forms, with significant variations in dialects across different regions.

    7. Bengali

    Speakers: Around 265 million

    Native speakers: About 230 million

    Regions: Bangladesh and parts of India

    Highlights: Bengali is the official language of Bangladesh and the second most spoken language in India. Alongside other languages like Hindi and Urdu, Bengali plays a crucial role in the cultural and linguistic landscape of the region. It’s known for its rich literary tradition.

    8. Portuguese

    Speakers: Approximately 220 million

    Native speakers: Around 220 million

    Regions: Brazil, Portugal and parts of Africa

    Highlights: Portuguese is mainly spoken in Brazil, which is the largest Portuguese-speaking country. It has a growing number of speakers in Africa.

    9. Russian

    Speakers: Around 258 million

    Native speakers: Approximately 154 million

    Regions: Russia, Eastern Europe and Central Asia

    Highlights: Russian is one of the six official languages of the United Nations and is widely spoken in the former Soviet Union countries.

    10. Japanese

    Speakers: Approximately 128 million

    Native speakers: Around 128 million

    Regions: Japan

    Highlights: Japanese is predominantly spoken in Japan and is known for its three writing systems—Hiragana, Katakana and Kanji. It has a rich cultural history and is influential in technology and entertainment.

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