OneNote is a pretty useful note-taking app that receives updates regularly. Recently, Microsoft rolled out built-in image editing options and UX enhancements for the search bar in OneNote. Now, the company is ready to deliver a capability that will greatly benefit customers, especially those who don"t really like the default proofing process that OneNote currently follows.
Essentially, Microsoft is giving you more flexibility and control over how the proofing process works in OneNote. Up until now, OneNote applied proofing at a paragraph-level based on your keyboard language, which already worked great for multilingual users.
However, Microsoft is now going a step beyond that by offering more configurations that allow you to apply a proofing language for the entire OneNote page and even set a default proofing language that stays consistent throughout your OneNote experience, regardless of your keyboard input. That said, it is still giving customers the option to select a particular paragraph and apply a separate proofing language on it.
In order to leverage the new proofing configurations, navigate to Review > Language > Set Proofing Language. If you want to apply your setting to the current page entirely, click Apply to whole page, and if you want it to be the default for future pages and content as well, uncheck the Follow keyboard input language toggle.
That said, this feature is exclusive to OneNote for Windows customers right now, and is only available in Insider releases running Version 2512 (Build 19515.20000) or later. However, general availability is not that far away and is tentatively scheduled for the end of January 2026. Microsoft has emphasized that if customers have feedback, suggestions, or want to report bugs in this capability or OneNote as a whole, they should use the integrated feedback mechanism that can be accessed through the Help > Feedback menu.