Another thing that has been completely broken by Microsoft over the years. Spell check in Word today is absolutely godawful, it generates more false positives than true positives by a massive margin. Shit like "the" having a red squiggle. Drives me insane as every time I see it I think about how far software has fallen.
Word now switches the document language when you switch keyboard layouts... and then when you focus on a word you typed that it's memorized to be in that language, it switches the keyboard back to that layout.
As someone who uses the US layout but switches it to German to get ä, ü, ö, it's a schizophrenic experience...