Did you check Tools | Language | Set Language for the text in the table? Is
the table in a text box? If so, it will be checked after the main document.
The language is set to English US and the text is within a table/text box and
it still is not checking once I select spell check again. I purposely
mispelled words within the boxes/tables to see if it was working and it's
not.
In that case, and if you are absolutely positive that the exact word is
formatted with the correct language and not marked as "Do not check spelling
or grammar," then check the custom dictionary to see if it's been added by
mistake.