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Speaking four languages may keep brains up to 13 years younger than monolinguals
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People speaking four languages showed brains that appeared about 13 years younger than monolinguals, with earlier acquisition and higher proficiency strengthening the effect.
The research suggests sustained cognitive effort like language learning may offset age-related decline in brain connectivity. Engineers facing long careers might consider deep, effortful learning as a potential factor in long-term cognitive resilience. However, the study cautions that lifestyle and social engagement could also explain the observed differences.
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Researchers used magnetoencephalography and AI to create a brain aging clock applied to 144 people.
Speaking four languages correlated with brains appearing roughly 13 years younger, while two languages showed a six-year difference.
The effect was a gradient, with higher proficiency and earlier acquisition of a second language linked to more delayed brain aging.
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