AWARD® uses the browser’s built-in spell checker. If you use Ctrl + right click this will bring up any spelling suggestions. Incidentally, this will get the browser’s default right click context menu to appear, and should work work in Chrome, Edge, and FireFox.
If you don't like that idea and don't mind losing the formatting capabilities like bold, lists etc, you could switch onto the Script Free* platform - that will just use a regular text area and suggested corrections will appear with a standard right click (i.e. no need to hold Ctrl at the same time).
*Switch to script free via your profile
Click on your profile name - Top Right hand corner of AWARD > Edit > Set the PLATFORM to "script free" > Save > Close