On World Swahili Day, we take at a look at how far the east African language has travelled and hear from people teaching it from Moscow to Bogotá.

Also in the pod: Since the covid 19 pandemic, there’s been growing interest in fruit bats. Our Global Health Correspondent Naomi Grimley has been given special access to a scientific research project in Ghana which aims to monitor them.

Also, we give you some more details on Threads, Meta's answer to twitting.