The ability states that "You can comprehend any written word or symbol, should it hold any linguistic meaning." The magical properties of a spell scroll have nothing to do with its linguistic meaning, so simply being able to read the words does not allow you to bypass class requirements for casting spellssimply being able to read the words on the scroll does not allow you to bypass class requirements for casting spells and the like. You could probably still read the literal words on a spell scroll (if it is even written in words), you just won't know how to use them to cast the spell. And of course, this is all assuming that the scroll is even written using words with linguistic meanings, which is not necessarily the case.
