When closing and saving files on the Swedish Mac version of Photoshop 2017.0.1 with the shortcuts cmd-W and cmd-S, the cmd-S command will select "Do not save". Teh problem was there in 2017.0.0 as well.
It still means 'Save' on my Mac, but you have to use it BEFORE you use Cmd-W to close the window. If I hit Cmd-W first, so I get the 'Do you want to save this document?' dialog, hitting Cmd-S doesn't work (and I don't think it ever did). You have to hit ENTER in that dialog.