macOS has a system-wide spell-check feature. Fortunately, for reader JGC, this feature can be adjusted by the user, especially when a problem like his occurs.
Recently, the spell-check in Facebook is defaulting to French corrections. It first was funny, but it now is a serious consumption of time to constantly check for these auto-corrections. Any ideas how to remedy?
Since the spell-check in macOS is system-wide, you should be seeing this in more than one application if it’s happening in Facebook via a web browser.
There is a language setting for your Facebook account, but it doesn’t seem to interact with spell-check, which is a system function. Further, if you change your Facebook language, it changes its interface to use that language, which would be obvious to you.