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.

  • In PowerPoint, go to Review tab, in the Language group, click Language, Set Proofing Language, select English, click Set as Default.Yes to confirm and OK to apply it. – WinniL Feb 21 '19 at 9:10
  • English is already default! Finnish doesn't even show as an option there. – A. Vieira Feb 21 '19 at 9:17
  • Go to the Control Panel > Programs and Feature, select Microsoft Office 365 ProPlus - en-us, click Change > Online Repair to have a try. – WinniL Feb 22 '19 at 8:55
  • When you start PowerPoint and create a new presentation, are the placeholder prompts in English or Finnish? That is, the "Click here to ... whatever" things that appear where your title, text and other content will be. – Steve Rindsberg Feb 22 '19 at 16:01
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I had the same problem in Powerpoint 2010 and found the solution here: Under Options->Language, there is a list "Choose Display and Help Languages" in which "Match Microsoft Windows" and "Match Display Language" should be moved to the bottom. After restarting Powerpoint, the proofing language didn't change automatically anymore. Maybe this also works for Powerpoint 365.

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