Spell check was working fine. Now, all of a sudden, it doesn’t. When I go to the drop down menu in the spell check box to select the text language English is not there. Only several versions of French and Spanish. But when I go to the Tools-Options-Writing Aids everything is checked as it should be.
Have a look at this question and see if you can check that there aren’t errors in your settings as compared those listed in the answer by manj_k
As a fall-back there is the extension English Dictionaries.
Finally got it to work. Went to AppData>Roaming>LibreOffice>4 and renamed the “4” file to “7”. Tried the spell check and it worked properly. I found this solution by entering “Libre Office spell check not working” in my search engine. I use DuckDuckGo.
A less drastic resetting of user profile might have been sufficient. I presume the cache folder was rebuilt but maybe not.
For a more balanced method of resetting user profile please see my answer to question 286461