When good spelling simply isn't enough, there's grammar!
This encompasses the script capability of it's parent-mod, Spelling. So if you want to be able to use Spelling with scripts, you're going to need this. Really, it's just a plugin, but considering that it invites people to actively make changes to the lua code, it's probably best to section it off into its own entity. That way, people can donwload a new copy of Spelling without having to worry about overwriting their scripts. Hooray!
Plus, I really wanted an excuse to name something Grammar.
...can you blame me?