Some of us speak more than one language, and we may at different times prefer one over the other on the Mac. In some cases, we might also have licensed software that only works when the app or macOS is set to a particular language or keyboard.
Apple lets you perform a global or app-specific language change, which is quite handy. (Having a problem with the language selected with macOS Recovery? See this column from last year.)
To change your language for macOS, you start with the Language & Region preference pane. If you don’t see it in System Preferences—it didn’t show up for me in macOS Catalina—choose it from the View menu with System Preferences open.
