Being bilingual can help keep your brain in good condition

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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 couple sat on a sofa one with a laptop the other with a book; they are both laughing

    How English conversation works

    By Richard Cleeve

    English language teachers everywhere spend time and energy helping students practice their conversation skills. Some may ask whether conversation in English can actually be taught. And – if it can – what the rules might be.

    To explore these questions, we spoke to world-renowned . He is an Honorary Professor of Linguistics at the University of Bangor and has written more than 120 books on the subject.

    What makes a good conversation?

    “It’s very important that we put this everyday use of language under the microscope,” he says. He highlights three critical facets of conservation that we should bring into focus:

    • Fluency
    • Intelligibility
    • Appropriateness

    But all in all, he says that people should walk away from a conversation feeling like they’ve had a good chat.

    “For the most part, people want that kind of mutual respect, mutual opportunity, and have some sort of shared topic about which they feel comfortable – and these are the basics I think.”

    The rules of conversation

    There are plenty of ways you can teach learners to engage in a successful conversation – including how to speak informally, use intonation, and provide feedback. So let’s take a look at some of the key areas to focus on:

    1) Appropriateness

    Fluency and intelligibility are commonly covered in English language classes. But appropriateness can be more complicated to teach. When preparing to teach conversational appropriateness, we can look at it through two different lenses: subject matter and style:

    2) Subject matter

    “What subject matter is appropriate to use to get a conversation off the ground? There are cultural differences here,” he says. The weather is often a good icebreaker, since everyone is affected by it. The key is to find a common topic that all participants can understand and engage with.

    3) Style

    Teachers can also teach students about conversational style, focusing on how to make conversations more relaxed in English.

    There are “several areas of vocabulary and grammar – and pronunciation too, intonation for example – as well as body language, in which the informality of a conversation is expressed through quite traditional means,” says David. One example he offers is teaching students how to use contracted verb forms.

    4) Simultaneous feedback

    This is what makes a conversation tick. When we talk with someone, we let them know we’re listening by giving them feedback. We say things like “really” or “huh” and use body language like facial expressions and gestures.

    Of course, these feedback noises and expressions can be taught. But they won’t necessarily be new to students. English learners do the same when speaking their own language, anyway.

    Keep in mind though, that when it comes to speaking online on video conferencing platforms, it’s not easy to give this type of simultaneous feedback. People’s microphones might be on mute or there might be a delay, which makes reacting in conversations awkward. So, says David, this means online conversations become much more like monologues.

    5) Uptalk and accents

    Uptalk is when a person declares something in a sentence, but raises their intonation at the end. For English learners, it might sound like someone is asking a question.

    Here’s an example:

    • “I live in Holyhead” said in a flat tone – this is a statement.
    • “I live in Holyhead” said using uptalk – you are stating you live here, but recognize that someone else might not know where it is.

    Now, should teachers teach uptalk? David says yes. For one, it’s fashionable to speak this way – and it can be confusing for English learners if they don’t understand why it’s being used in a conversation.

    “The other thing is that we are dealing here with a genuine change in the language. One of the biggest problems for all language teachers is to keep up to date with language changes. And language change can be very fast and is at the moment,” he says.

    When it comes to accents, David is a fan. “It’s like being in a garden of flowers. Enjoy all the linguistic flowers,” he says, “That’s the beauty of language, its diversity”.