The web is finely stitched like a real handkerchief, and the lettering made from the web is clear enough that Elaina and the kids can read and understand it. And for the first time, this is an unprecedented thing coming from a monster like the spider.
But considering it decided to communicate by using its webs, that only means one thing, and that this spider possesses intellectual capability to understand and communicate with humans, which is hard if the individual itself is not even one of the intelligent beings. She needs to verify if the spider is actually just using a regular copied response just to let their guard down. Asking it questions and seeing how this spider answers should allow Elaina to know if this spider is acting or genuinely answering.
