https://en.m.wikipedia.org/wiki/Acad%C3%A9mie_fran%C3%A7aise
The US by contrast has a similar level of prescriptivism around the English language, largely comprised of biases against regionalisms, speech patterns of the working class, and dialects like AAVE. But it’s enforced informally through snobbery and various other forms of social and institutional exclusion, which can be much harder to schematize and challenge.
i.e. intentionally use definitions you know are confusing and then - as language is famously a single person endeavour - blaming the listener when they misunderstand. This arrangement works particularly well as a shibboleth to prevent people knowing what you're saying if they have the poor foresight to choose another language as their native tongue.