Acclaimed Australian linguist Professor Nick Enfield has come to the conclusion that language is good for lawyers, for the purposes of persuasion, but bad for scientists who seek to accurately represent reality. It's a fascinating idea he explores in his new book Language vs Reality. What can language describe and where does it fail? Presenter Michael Rosen explores this with him in an in-depth conversation.

Nathan talks with Michael about words we use when talking about mental health.

Producer Sally Heaven

It's Gone Dark Over Bill's Mother's

In Britain talking about the weather is a good neutral way to start conversation. Because we have such varying weather conditions (three seasons in one day) there is always something to marvel at or grumble about. But around the world sayings and descriptive words for clouds, winds, rainfall and dry spells are also popular. Michael Rosen is joined by lexicographer, Harry Campbell, who compiled a Compendium of Weather to discuss the various ways we like to talk about it from the North East of Scotland to the South West of England via Wales and Northern Ireland. Snel winds, dreich days and nesh climates all feature along with some of the hundreds of contributions sent in by listeners from around Britain.

Producer for BBC audio in Bristol, Maggie Ayre

Adoptive parent Margaret Reynolds talks about the language used around children in care. From the unthinking people asking about 'real parents' to the clinical language used to describe children's lives.

Producer for BBC Audio in Bristol, Sally Heaven

Dr Jamila Lyiscott describes to Michael Rosen the 3 ways in which she speaks English according to whether she's at home, at school or with friends. Her TED talk on the subject is one of the most-viewed language performances on the internet and is used in education. She self-describes as a trilingual orator and asks: who decides who is articulate?

Produced by Beth O'Dea for BBC Audio Bristol

Are you a lover of SF and all things fantasy, or merely a fan?

Jesse Sheidlower formerly of the Oxford English Dictionary began compiling a dictionary of sci-fi 20 years ago and has been updating it ever since. He brings Michael Rosen up to speed with current parlance in the SF world (true fans prefer this term rather than sci-fi) and explores the origins of words and sayings to do with robotics, extraterrestrial life and space exploration.

Producer: Maggie Ayre

Will machine translation ever be as good as human translation? How do services like Google Translate actually work? How does Alexa or Siri know what I'm saying? And will I ever be able to have a true conversation with my virtual assistant? Michael Rosen explores new developments in speech recognition, machine translation and speech synthesis with journalist and author Lane Greene.

Lane Greene is the language columnist and Spain correspondent at The Economist. He’s the author of two books about language: 'Talk on the Wild Side' and 'You Are What you Speak'.

Produced by Mair Bosworth for BBC Audio in Bristol

Michael Rosen is joined by John McWhorter, author and linguist at Columbia University, to talk about his life in language.

John H. McWhorter teaches linguistics, American Studies, and music history at Columbia University. He is a contributing editor at the Atlantic, columnist at the New York Times and host of Slate’s Lexicon Valley podcast. McWhorter is the author of twenty books often on the subject of language, including The Power of Babel: A Natural History of Language, Talking Back Talking Black, Words On The Move and Woke Racism.

Producer: Eliza Lomas

Some idioms feel like they've been with us forever. We're used to saying it's 'raining cats and dogs', that we feel like 'a fish out of water' or that someone has been 'pulling our leg'. But other idioms have emerged relatively recently, such as 'Groundhog Day', 'first world problems' or 'computer says no'; we might hear people say that a long-running TV show has finally 'jumped the shark' or that a politician has deployed the 'dead cat strategy'.

Just like new words, new idioms emerge in language all the time, and enter our vocabulary from TV, movies, sport, politics and the Internet. Michael Rosen talks to Gareth Carrol about the surprising origins of some of these modern idioms and why we pepper our speech with so much formulaic language.

Dr Gareth Carrol is Senior Lecturer in Psycholinguistics at the University of Birmingham and is the author of 'Jumping Sharks and Dropping Mics: Modern Idioms and Where They Come From'.

Produced by Mair Bosworth for BBC Audio

Michael Rosen asks Julie Sedivy about what happens when we lose our first language.

Julie Sedivy's family left their home country, the former Czechoslovakia, when Julie was a small child. They arrived in Canada as refugees with no English. Michael and Julie discuss the role of language within Julie's family story: how young children assimilate, how parents adapt and what can learned from these family experiences for the whole of society.

Julie Sedivy is a Canadian writer and language scientist, whose book on losing and reclaiming her first language is called Memory Speaks.

Producer: Eliza Lomas for BBC Audio, Bristol.