Realistically they probably don't need to do that. The filings are usually pretty heavily lawyered up and the lawyers are pretty lazy on language updates.
Yeah, people have been doing sentiment analysis of press releases etc for years now and very few corporates bother trying to use software to test/counteract it
Companies are already doing this. IR consultants have, allegedly, been advising exec teams to use/not use certain words based on their impact on AI models. It is inevitable.
SEC filings are somewhat more robust because they are a standardized format but the point of many of these frauds, for example SinoForest, was about things which weren't in the document not the things that were (the stuff that was in documents was never a smoking gun...iirc, I remember looking at the stock before it happened...a lot of these Chinese frauds had totally fine numbers though, that was the point).
