Bilingualism & Aging
Why a second language may protect your brain
Speaking two languages may add years to your cognitive health. Research suggests that lifelong bilingualism can delay the onset of dementia symptoms by an average of four to five years. The reason isn't that bilinguals are smarter. It's that constantly switching between languages gives the brain's executive control system a daily workout.
Every time a bilingual person speaks, their brain has to inhibit the language they're not using and pull from the one they are. That constant management strengthens the same executive functions that decline first with age. The good news: it's not all-or-nothing. Even adults who learn a second language later in life show some cognitive benefits, particularly when they actively use both languages.
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Bilingualism & Aging