This episode explores the cognitive benefits of multilingualism, specifically focusing on the experiences and research surrounding polyglots. The discussion begins with a quiz question about the country with the most official languages, setting the stage for an exploration of the advantages of knowing multiple languages. More significantly, the interview features a cognitive neuroscientist who explains how learning multiple languages from a young age enhances brain function, acting as a form of mental exercise and potentially delaying the onset of dementia. For instance, the neuroscientist highlights the ability of multilingual individuals to switch between languages and filter out irrelevant information. In contrast, the interview also includes the perspective of a BBC journalist who learned multiple languages due to her family's relocation across different countries, emphasizing the impact of immersion in language acquisition. The journalist's experience highlights the ease with which children pick up new languages compared to adults, and the importance of family support in maintaining one's mother tongue. Finally, the episode concludes with practical tips for language learning, such as immersing oneself in the language environment, and a review of key vocabulary terms.