Sharepoint Online uses MS Editor for spell checking, gets errors with Swedish text

Micke640 

I have spent far too much time on this, with about 20 breakpoints in the JavaScript seeing what the code looks for and then testing for it. Unfortunately I sometimes get different results by re-running the same page.

There is definitely a difference with the extension on or off. With the extension on, it is willing to recognize more than one language and to respect the language-specific configuration of the extension, but those languages must be among the top 3 browser languages.

There is a fair bit of processing dedicated to the language of Topic type Communication pages the multilingual feature enabled. Within it, but sometimes elsewhere, it looks for a cookie called "siteLangPref" to override the language selection. As I mentioned elsewhere, this is the cookie that is set when you select the dropdown language list on multilingual sites (note: never use that selector, it has too many side effects). When it is set, it often returns the "wrong" language code, one that does not correspond to the actual language.

With a little tinkering you can change which one language it will ignore if it is spelled correctly, but it will give squiggles for the other languages. Without the extension, I have not found a way to make it accept more than one language.

I wonder whether it is like the Teams spell checker, where you have to have installed the dictionaries in the local workstation version of Office.