My friend is using Microsoft Word for Mac (which is a total train smash). and we want to change the spell check from English (US) to English (UK).
This is what I have tried:
Try this:
Play store download for pc. Select all the text in the document (keyboard shortcut should be +A)
Go to Tools / Language
and select English (UK) (instead of English (US) as shown below):
Remember to click the Default button (agree to the prompt)
Note: I've found that even after doing this (on Word for Windows at least), it still considers certain US spellings as acceptable alternates for UK ones and refuses to mark them as incorrect.