My pick of the week is The World in Words. A podcast about languages and the people who speak them, hosted by Patrick Cox.
If you are interested in languages around the world or linguistics, give this podcast a try.

Not sure where to start?
There is a large back catalogue of episodes available. Simple start with the newest one, or try the one that got me hooked originally:
It’s easier to get people to stop speaking a language than to take it up again. Just ask the Irish.