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Can learning new languages make us forget our mother tongue? CrowdScience listener Nakombe in Cameroon is concerned that his first language, Balue, is slipping from his grasp. He has learned multiple languages through his life, but Balue is the language of his family and home. It鈥檚 central to his identity and sense of belonging. So why does it seem to be fading from him, and what can he do to get it back?

We search for answers, investigating what happens in our brains when we struggle to recall languages, as well as the social and economic factors that lead to language loss. Presenter Anand Jagatia asks Michael Anderson from the University of Cambridge, an expert on memory and forgetting, whether forgotten languages disappear from our brain, or just become difficult to access. Linguist Monika Schmid from the University of York takes us through the phenomenon of first language attrition, and has words of reassurance and advice for Nakombe and others in his situation.

And we meet Larry Kimura from the University of Hawai鈥檌 at Hilo, a pioneer of Hawaiian language revitalization, and Gabriela P茅rez B谩ez, an expert in indigenous languages and language revitalization at the University of Oregon. They explain why languages around the world become threatened, and how to keep them alive.

Presenter: Anand Jagatia
Producer: Margaret Sessa Hawkins
Editor: Cathy Edwards
Production Co-ordinator: Ishmael Soriano
Studio Managers: Sarah Hockley and Omera Ahamed

(Photo: Diccionario, Argentina Credit: PonyWang via Getty Images)