I'd like to mimic the squiggly-red underlining that Word uses when there's a misspelling. The text-decoration property makes dotted underlines pretty easy, but not squiggly red like this, AFAICT: ...

Microsoft Word is abundant with features that let you customize almost every aspect of it. You can change how the text or an image looks, or you can design a brochure. All you need is to know the ...