Before LLMs, SEO content spammers used something called an "article spinner" which could rewrite lots of versions of the same article (which may or may not be someone else's article) by substituting synonyms, producing just enough variation to not get flagged as duplicate content by search engines. Some of the substitutions produced truly bizarre writing, but those pages were written for Googlebot to count the back links, not for human readers. This looks like what you'd get if you turned random substitutions down to a minimum to avoid plagiarism detection...