The spell checker functionality may not be available out of the box, but a rudimentary spell checker functionality can be achieved by a simple modification to the main.js file located in <drive-letter>:\Infoshare\Web\InfoShareCS\lib\fontoXML.

The main.js injects the Draft Space iframe. The browser-based spell checking is disabled in the main.js file and by setting the spellcheck attribute to true for all editable textarea elements we can have a rudimentary spell checker functionality.

Draft Space with spellcheck set to true.

I do not think we can have Grammarly working here since it does not work in iframes. If you read this forum thread, it says, "Unfortunately, iFrame is not supported by Grammarly at this time." So for advanced grammar and spell check functionality Ginger's Chrome extension seems to work. For this we still have to modify the main.js file and set spellcheck to true. 

Was there a CSS component to making this work? I tweaked the .js file and Ginger now appears to be finding 8 spelling mistakes in my test file, but give no visual indication of where they are. When I agree to allow Ginger to open and edit my content, it corrupts it when I return to the Draft Space authoring environment. 

Was there a CSS component to making this work? I tweaked the .js file and Ginger now appears to be finding 8 spelling mistakes in my test file, but give no visual indication of where they are. When I agree to allow Ginger to open and edit my content, it corrupts it when I return to the Draft Space authoring environment.