The Study
Age-Related Differences in Speech and Gray Matter Volume: The Modulating Role of Multilingualism
This study looked at a group of people at one point in time and noticed that older people who speak more languages tend to speak better and have different brain patterns. But it doesn't prove that speaking more languages caused those differences — maybe those people were just different to begin with.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
People who speak many languages may have brains that look younger than those of people who speak only one language, even as they get older.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 520 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — better speech and younger-looking brain structures could mean multilingualism helps protect against some effects of aging.
- 2Older adults who speak multiple languages have better speech than those who speak only one.
- 3Their brains also show less aging in key areas.
- 4Native language speech is clearer than second language speech in older adults.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
NeuroImage
Year
2025
Authors
Hanxiang Yu, Keyi Kang, Christos Pliatsikas, Yushen Zhou, Haoyun Zhang
Related Content
Claims (6)
People who speak multiple languages have brain structures that are 6 to 13 years younger in appearance compared to people who speak only one language.
Older adults who have used multiple languages throughout their lives speak more clearly in both their first language and any additional languages they learned.
In older adults, the bilateral putamen shows measurable changes related to lifelong multilingual use, and these changes are linked to variations in speech performance.
As people age, their speech becomes less clear and their brain's gray matter volume decreases, and these two changes occur together.
Older adults speak their first language, Cantonese, more clearly and accurately than their second language, Mandarin, because the brain's ability to process the first language is better maintained with age.
In older adults, the right middle temporal gyrus is necessary for producing speech in both native and non-native languages, showing that the same brain area supports multilingual speech.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.