Hello,
I have got a problem where I use Spell Checker, and when it finds an error, and offers suggestions, what to change the word with the error to, clicking on the suggestion will not actually correct the word in the text. Restarting the Spell Checker points out the same error, that is still there. On top of that the word with the error is not highlighted in the text, and I cannot jump to it, as I was able to before, I have to manually find the word in the text and manually correct it to what it suggests.

I have not seen this. Which build of Word 2016?
See Mastering the Spelling Checker by Suzanne Barnhill, MVP.

Even though the site shows 2013 as my version, I do have Word 2016.

I am not good at finding these things, where can I see which build I have?

Okay I think I got it figured out, the solution was simply as it is shown on this site:
https://www.timeatlas.com/word-spell-check-not-working/

Note that Suzanne S. Barnhill's article (http://wordfaqs.ssbarnhill.com/MasterSpellCheck.htm) is similar to the one you found; however, Suzanne includes a more complete discussion.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional

Thank you for the link, but it is completely fine for now, it works as intended ^^

Suzanne's article may come in handy for future use.

__________________
Stefan Blom
Microsoft Word MVP

Microsoft 365 apps for business
Windows 11 Professional