Carmen Fought is a Californian Valley Girl, born and bred and she's, like, there's nothing wrong with using 'like.' And Michael's, like, come on Word of Mouth and tell us why. Producer Sally Heaven

Most groups of wildlife can be described as a flock or a herd, a swarm or a shoal – but where is the fun in stopping there? From an army of ants to a dazzle of zebras, an exultation of larks to a murder of crows, the English language is brimming with weird and wonderful collective nouns to describe groups of animals and birds. Michael Rosen talks to Matt Sewell, author of 'A Charm of Goldfinches', about some of the more obscure examples that have made their way into common usage as collective nouns for creatures of the land, the sea and the air... Produced for BBC Audio Bristol by Becky Ripley

Michael Rosen talks to sociolinguist Louise Mullany about all the ways in which we say sorry. From the sympathetic sorry in the face of bad news, to the polite sorry we say to strangers in the street. Via workplace hierarchies, gender differences, and the nitty-gritty of political apologies. Louise is a Professor of Sociolinguistics at the University of Nottingham and author of 'The Science of Politeness', due out next year. Produced for BBC Audio Bristol by Becky Ripley

Michael Rosen talks to cyber-pyschologist Dr Nicola Fox Hamilton about the new language that has emerged now that so many relationships begin online. She has studied the way people use words and expressions to describe themselves in their dating profiles as well as their experiences of internet romance. She reveals how many of the creative new terms to describe relationships forged this way spring from African American speech and language. If you want to avoid being ghosted, catfished or bread-crumbed then this is for you. Producer for BBC Audio Wales and West of England: Maggie Ayre

Snotty Gogs and Moggie Nightgown may not immediately mean a lot to you but as common or folk names for the Yew berry and Wood anemone they reveal a fascinating social and cultural history of the countryside. Michael Rosen talks to the natural history broadcaster Brett Westwood about the informative, often funny sometimes bawdy names given to British plants and flowers. Producer: Maggie Ayre