The Claim
In adults aged 51–90 across 27 European countries, speaking two or more additional languages is associated with a slower rate of age-related decline, with this association being stronger in individuals aged 78–90 years compared to those aged 51–77 years.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
Adults aged 78 to 90 who speak two or more additional languages show a slower rate of age-related decline compared to those who speak fewer languages.
See the scientific wording
In adults aged 51–90 across 27 European countries, the protective association between multilingualism and slower aging is stronger in older age groups (78–90 years) for those speaking two or more additional languages, suggesting that cumulative multilingual exposure may buffer age-related decline more effectively in later life.
Speaking multiple languages over many years strengthens the brain's ability to switch between tasks and manage complex information, which keeps brain circuits more active and better connected. This makes the brain more resistant to damage as it ages, especially in older people who have used multiple languages for decades.
What the research says
1 studyPeople over 78 who speak two or more languages show even stronger protection against brain aging than younger people, and this study found exactly that — the more languages you speak over time, the slower your brain ages, especially when you're older.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.