Lexicon Valley is a language-focused podcast produced by Booksmart Studios (formerly a Slate podcast), built around three recurring hosts: linguist John McWhorter, and co-hosts Bob Garfield and Mike Vuolo. The format splits between McWhorter's solo episodes — extended etymological and grammatical explorations, such as tracing the Old English roots of 'know' or the R-dropping British accent's post-Revolutionary origins — and co-hosted or interview episodes where Garfield and Vuolo banter through a term's history or bring in outside experts. Guests tend to be authors or specialists tied to a specific book or research area, such as a Merriam-Webster lexicographer discussing dictionary definition-writing or a ProPublica president discussing the authorship of Kennedy's inaugural address. Recurring subject matter includes etymology and word origins, idiom history, grammatical prescriptivism versus how language actually changes, dictionary and lexicography practice, and the intersection of language with politics, rhetoric, and historical texts. Episodes often use archival audio — old films, radio broadcasts, sitcom clips — as direct evidence for pronunciation shifts or usage claims. McWhorter also periodically addresses claims made about linguistics in the media, including correcting misattributed or AI-generated claims about his own views. The show is aimed at listeners already curious about language mechanics rather than casual audiences, and it runs to roughly 25–33 minutes per episode. Tone throughout is educational and conversational rather than academic or lecture-style, with hosts using playful banter and concrete examples to unpack technical linguistic ideas. It is carried by standard podcast advertising (meal-kit and shipping sponsors) rather than being ad-free.