Why does everyone say OOO! when they see someone fall down? Why do we say YUM when we feed a baby? And what's the deal with fillers like UM?

For this episode we're talking about non-lexical vocalisations with Dr Eleonora Beier and Dr Emily Hofstetter. 

Also: linguists are diving into Grambank, a database with detailed information about grammatical features in over 2,500 languages. With its release, we're talking to project leaders Dr Russell Gray and our own Dr Hedvig Skirgård.

Also, Hedvig gives us our yearly Eurovision language update. Ben's not here, so he won't complain.