alt Hacker NewsMaybe in the USA. But bodies like the French Academy and many similar ones in other countries very much do issue opinions on correct grammatical (and vocabulary) usage. And members of these institutions are very much considered the top of their field in their countries.
The members of the French Academy are not linguists. They are mostly writers or academics from other fields (history, philosophy, etc). If you can read French, check here: https://www.academie-francaise.fr/les-immortels/les-quarante...
> And members of these institutions are very much considered the top of their field in their countries.
Maybe, but their field isn't linguistics.