Why being bilingual helps keep your brain fit


Most people in the world speak more than one language, suggesting the human brain evolved to work in multiple tongues. If so, asks Gaia Vince, are those who speak only one language missing out? BBC Focus magazine. August 2016.

In a café in south London, two construction workers are engaged in cheerful banter, tossing words back and forth. Their cutlery dances during more emphatic gesticulations and they occasionally break off into loud guffaws. They are discussing a woman, that much is clear, but the details are lost on me. It’s a shame, because their conversation looks fun and interesting, especially to a nosy person like me. But I don’t speak their language.

Out of curiosity, I interrupt them to ask what they are speaking. With friendly smiles, they both switch easily to English, explaining that they are South Africans and had been speaking Xhosa. In Johannesburg, where they are from, most people speak at least five languages, says one of them, Theo Morris. For example, Theo’s mother’s language is Sotho, his father’s is Zulu, he learned Xhosa and Ndebele from his friends and neighbours, and English and Afrikaans at school. “I went to Germany before I came here, so I also speak German,” he adds.

Was it easy to learn so many languages?

“Yes, it’s normal,” he laughs.

He’s right. Around the world, more than half of people – estimates vary from 60 to 75 per cent – speak at least two languages. Many countries have more than one official national language – South Africa has 11. People are increasingly expected to speak, read and write at least one of a handful of “super” languages, such as English, Chinese, Hindi, Spanish or Arabic, as well. So to be monolingual, as many native English speakers are, is to be in the minority, and perhaps to be missing out.

Multilingualism has been shown to have many social, psychological and lifestyle advantages. Moreover, researchers are finding a swathe of health benefits from speaking more than one language, including faster stroke recovery and delayed onset of dementia.

Bilinguals perform these tasks much better than monolinguals – they are faster and more accurate.

Being so bound up with identity, language is also deeply political.

Many bilinguals say they feel like a different person when they speak their other language.

Perhaps we ought to start doing more cognitive exercises to maintain our mental health, especially if we only speak one language.

It takes three years for a baby to learn a language, but just months for an adult.

This article first appeared on Mosaic and is republished here under a Creative Commons licence.

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