In reviewing the requests for updates to E-NDMS, I noticed one for a spell check function. Fortunately for us, most modern browsers already provide a spell check function. Notice in the screen shot below the words underlined in the Model Services text field.
Obviously this only allows you to see which words are spelled incorrectly. If you want to go a step further and get recommendations on spelling and/or grammar corrections, checkout the Chrome Web Store or Firefox Add-ons. A variety of free tools are available to help with spelling and grammar. I would be surprised if Internet Explorer didn't have something similar, if not one already built in.