"It's a book about translation spells. Princess Luna mentioned something interesting about Jackson's language. According to Cadance, while it's completely incomprehensible to Equish speakers when spoken, it does share some words when written. Specifically in Unicorn Script." Twilight levitated another book out of her saddlebags. "I'm hoping that, at the very least, I can find or even create some sort of spell that can translate what he writes into Equish and what we write into his native language, using those similarities as a basis. It's not as good as a spoken conversation, but it should be good as a temporary solution."