I am using Adobe RoboHelp 2019. I use to get the output in form of printed documentation (MS-Word).
I have installed Microsoft Office Proofreading Tools. When I go through the output in MS-Word, I could see a lot of grammatical as well as other suggestions which RoboHelp Review option doesn't show or suggests. Following are such examples:
Correct punctuation and spacing
Using simple and concise language
and many more. It becomes very tedious if I find something like this becuase after correcting or changing the content, I have to do the same changes in RoboHelp source file. Is Adobe working on it?
Unless you want to receive letters from lawyers telling you that they are dealing with the estate of your long lost uncle who left millions that they will send you for a small admin fee, I suggest you change your screen name from your email address.
Am I right in thinking you are using 2019 Classic? If so I doubt that will be developed in that respect as the effort is now going into 2019 (New UI). Grammar checking is not in that version yet but I would imagine it will get added at some point.
Meantime I think you will need to continue with Classic.