The latest evidence that speaking more than one language is a very good thing for our brains comes from a study finding dementia develops years later in bilingual people than in people who speak just one language.
The study, conducted in India and published Wednesday in the journal Neurology, is not the first to reach this conclusion. But it is the largest and comes with an intriguing new detail: The finding held up even in illiterate people — meaning that the possible effect is not explained by formal education.
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