In PowerPoint's Language Preferences I have English(United States) (installed and default) and Portuguese (not installed). During my editing of slides the language is constantly wanting to change to Finnish (I live in Finland and the computer is Finnish originally). I set the contents of a text box to be English, but as I make a new line (press Enter) it changes to Finnish.
Why is Finnish a spell-checking option if it doesn't show in the Language Preferences? And why does it change on its own on new lines? Or in any context? This a very undeterministic behavior. It's very hard for the user to keep track of incorrect changes. Is there a way to turn off this feature and use a single spell-checking language for the whole document?
Note: I have 3 keyboards set in Windows 10, FIN, POR and ENG. I don't really need the ENG one, so maybe I'll disable it. In any case keyboard layout shouldn't affect the spell-checker of a text editing software.
For now I'm changing the language on every new-line.