Michael Rosen talks to Sophia Smith Galer about the languages we're losing. She's found that by the end of this century half of the world’s 7000 languages will be gone, and she's travelled across the world to meet both the people who are experiencing this and those who are fighting to keep the words and the knowledge they hold alive.

Michael Rosen talks to Ione Georgakis from Tourette Action about about her personal and professional experience of Tourette Syndrome and vocal tics. How and why do tics happen, and what are some of the myths and misunderstandings around the syndrome?

Produced for BBC Audio Bristol by Sally Heaven, in partnership with the Open University.

Michael Rosen talks to linguist Teddy Mack about Vincy, a language rooted in English spoken on the Caribbean island of St Vincent, alongside standard English. But the English Teddy encountered when he moved to the UK proved to be very different (and far from standardised) and he's learned to switch throughout his life.

Michael Rosen talks to James Geary about his lifetime obsession, aphorisms. These short, witty philosophical sayings have been coined by everyone from Emily Dickinson and James Baldwin to Hallmark, and even Michael's mum.

Produced for BBC Audio Bristol by Sally Heaven, in partnership with the Open University.

Michael Rosen talks to digital anthropologist Jennifer Cearns about the rise of AI companions- how do we talk to AI, and how does AI talk to us?

Produced for BBC Audio Bristol by Sally Heaven, in partnership with the Open University.

As a port city Liverpool has long been open to a wide variety of global influences and languages that developed into a way of speaking that's termed 'Scouse' - from a word that probably originates in the Baltic region derived from the word 'lobscouse'.

Produced for BBC Audio Bristol by Maggie Ayre in partnership with the Open University.

Michael Rosen goes on an alphabetical odyssey with linguist Dr Danny Bate, author of the book 'Why Q needs U: A History of Our Letters and how We Use Them'. From A through to Z, where did all our letters come from, and how have they changed over time?

Produced in partnership with the Open University by Becky Ripley.

Julia Donaldson, author of The Gruffalo and many other beloved children's books, tells Michael Rosen about her own writing, reading, speaking and listening. Her childhood experiences were a big influence, as was busking in Paris and writing songs which ended up on Play School and Play Away. One of the songs became her first book, A Squash and a Squeeze.

Michael Rosen on the linguistic comfort food of clichés, pragmatics and how we use language to connect us beyond the actual words used. Derek Bousfield explains how words do more than carry meaning: context governs what we say and how it’s understood.

The 'Manosphere' is a group of loosely affiliated mainly young males who have developed a specialised vocabulary to discuss women online in a negative and hostile way. Some of the vocabulary is a response to feminism which some men claim is diminishing their role in society. For other men a failure to attract women has given rise to phrases such as Chad and Stacey and a belief in the 80/20 theory - that 80% of women are attracted to just 20% of men who are Alpha males or Chads.

How did terms like “down the rabbit hole” and “gaslighting” enter the English language? How do other languages adapt expressions like these? Find out in an interactive guide with The Open University’s experts. Visit the BBC Radio 4Word of Mouth page and follow the links to The Open University.

Produced for BBC Audio Bristol by Maggie Ayre, in partnership with the Open University.