Reforms of French orthography
French orthography was already (more or less) fixed and, from a phonological point of view, outdated when its lexicography developed in the late 17th century and the Académie française was mandated to establish an "official" prescriptive norm. Still, there was already much debate at the time opposing the tenets of a traditional, etymological orthography, and supporting those of a reformed, phonological transcription of the language.
Source: Wikipedia — Reforms of French orthography (CC BY-SA 4.0)