All words are highlighted as misspelled in Pages and Numbers yet the correct dictionary has been selected in Settings

Recently all text I type in Pages, Numbers and Keynote are highlighted as misspelled. It happens on my iPad and my iMac. The keyboard dictionary is set to UK English on every device. The Region is set to UK yet no matter what I type it is underlined as misspelled. When I highlight the misspelled word I am offered the chance to “Learn Spelling” but I am offered alternative spelling in a different language. I am guessing the alternative language is Spanish but I am not 100% sure.