He explains things about the French languagge - where the word merci come from, why there are circumflexes on some words (hâte, pâte...), all manner of things.
And he touches on some anglicisms too. For instance pressing. A word that you might get as an adjective in English ("I have a more pressing engagement.") or as a verb ("We were pressing flowers.") but hardly ever as a noun ("From the first pressing of the olives").
In French it means a dry cleaner's. See Google Translate:
Here's Bernard Cerquiglini on the subject:
