In Québec we have Antidote. It's a good "old" piece of software you install on your computer and it integrates with office and other programs to provide _explanations_ of why what you write, looks wrong. No keylogger, no getting dumber. It essentially let's you either learn why you're wrong or decide the software is wrong. It used to be French only but they added English too a couple years back. I have no affiliation with Antidote, I just use it everyday.