Useful Redundancies (Multilingual Brains Have More)
Dementia is the result of age-related damage to the brain. While there are some drugs and dietary practices that help slightly in avoiding this damage, it turns out that bilingual brains function better at the same level of damage, probably due to redundancy in connections (mediated by the different languages’ words’ connections). I have a rich monolingual vocabulary, and so expect to enjoy some similar (probably less dramatic) benefit in my senescence. Still, it may be worth my time to extend my mostly-forgotten high school Spanish into a more usable state.
(according to the research of Ellen Bialystok)