Good news, and it is abundant!
First is Spell Checker (Courtesy Kris(i00)) at i00 at VBForums
Second is keeping Backup text for each day into a folder near the file.
Quick tips to use Spell Checker
1) Do not keep the “Show spell mistakes” always , it might slow down or flicker your document
2) Access full document spell checker from the menu or from the right button