How to Delete Misspelled Words added to the Dictionary via the Windows 10 OneNote App

The OneNote app uses Windows 10's native spell check, so any words accidentally added are stored in a text file at %APPDATA%/Microsoft/Spelling/. Since the added word is now considered correct, you can't auto-correct it anymore. So solve this, you can remove these words by editing the file default.dic. For me, it is stored in %APPDATA%/Microsoft/Spelling/en-US/.


To get to it via keyboard shortcuts, use Win+R to open the run prompt, and type in:

notepad %APPDATA%/Microsoft/Spelling/en-US/default.dic

There are three dictionary files in the en-US directory, and if you go up one level, you see this is the location WIndows stores dictionary files for all languages. So if you use other lanauges, you can look into the other folders.

Reference: https://www.windowscentral.com/how-edit-custom-spell-check-dictionary-windows-10