Researchers have catalogued 7,164 languages spoken around the world - some are used daily by billions. Half are spoken by less than 8000 people. The death of a language, when it’s no longer spoken as a first language by anyone living is a deeply significant moment in the cultural life of communities.

Multiple sources including the UN and National Geographic magazine have claimed this happens every two weeks. But we have reasons to be suspicious about that statistic. Gary Simons, executive editor of the Ethnologue language catalogue, explains where this idea came from.

Presenter: Kate LambleProducer: Debbie RichfordSeries producer: Tom CollsProduction co-ordinator: Brenda BrownSound mix: Nigel AppletonEditor: Richard Fenton-Smith