Core Insights - The article discusses the impact of multilingualism on healthy aging, highlighting that speaking multiple languages may slow down cognitive decline and reduce the likelihood of accelerated aging by half compared to monolingual individuals [2][3][6]. Group 1: Research Findings - A study involving over 86,000 participants aged 51-90 from 27 European countries found that multilingual individuals have a significantly lower risk of accelerated aging [3][7]. - The research established a biobehavioral age gap, which measures the difference between actual age and predicted age based on various health and lifestyle factors, indicating the speed of aging [6][7]. - The study revealed a dose-dependent effect of multilingualism, where the more languages a person speaks, the more pronounced the delay in aging [7][9]. Group 2: Implications for Public Health - The findings suggest that promoting multilingualism could be a viable public health strategy to support healthy aging at the population level [3][9]. - The research addresses a long-standing gap in aging studies by using a large and diverse sample, thus controlling for common confounding factors such as immigration status and wealth [9].