Word’s insistence on US English
Anybody who lives outside the US will know that Microsoft Word does evil things, with little bits of text changing unaccountably into US English at seemingly random times. Suddenly a perfectly spelt word like… well, spelt could be a contender actually, will get that curly red line underneath it.
And I’ve seen proof. Yesterday I was working on a document with revision marking turned on, and low-and-behold, in the middle of editing, it claimed I’d reformatted a table cell to be US English. But I hadn’t. Tried to undo it, and couldn’t.
Evil, that’s what it is. Evil. Particularly since my Word default is EN-AU, which also matches my Windows regional settings.
Next thing you know, it’ll be switching my A4 paper to Letter, as well.