ETA: oh and automatically detected the document language as French and made that the default, even though every word in it is English.
We have a company Word template doc that I have to use (on Windows) that does that. It suddenly decides that French is the default language and you have to change it back to English for every paragraph after that. Drives me potty. I have spent ages trying to work out why. It starts off fine then at some point just switched to French and no matter where I poke around in styles and section settings I cant find where its been set to French. You can set everything to English and it completely ignores it for each new paragraph.
It doesn't matter how often I change the default to English (UK) it eventually decides the document is French (OK, we're a Swiss company, but still it's an English document and all the words are English and the default is English). All I can periodically do is ctrl-a and set the language to English (UK) and wait for the next outbreak of Français.
It might be hidden in the styles, a feature that in itself should be a major time-saver, and indeed, anyone who's used proper layout tools will be familiar with, but the implementation in Word makes them unusable even to someone totally familiar with the concept elsewhere. As for the mess of themes and templates, also mostly rendered unusable, don't get me going.
For an additional boon, Word crashed yesterday evening and remember that auto-save option that definitely says
yes? You can guess how well that works.