I wanted to comment my question directly in the thread Is it possible to disable spell check systemwide? , but I do not have enough reputation to comment, so I opened a new thread:
I just upgraded from El Capitan to Sierra and wanted to disable spell check as always for years now with this procedure:
sudo mv /System/Library/Services/AppleSpell.service/Contents/Resources \
/System/Library/Services/AppleSpell.service/Contents/Resources.disabled
killall AppleSpell
Unfortunately this procedure doesn't work anymore as the Resources file does not exist anymore in System/Library/Services/AppleSpell.service/Contents
Does anybody know how to get rid of the spell check in Sierra?