It removes the red underlining from words I have already changed back to Australian spelling. But the next time I type “organise” or “realise” (e.g.) in the same document or another one it changes the s to a z. I then have to follow the process again to get the word to be recognised. I need a way to be able to change the settings on the computer permanently so that the default language remains as English (AUS) for all office documents. If there is no way to do this I am going to have to throw this stupid computer in the bin as it is driving me insane!