Not sure if I've missed the point, but good forensic software can parse grammatical structure and use that. The English language has enough flexibility for ever

Not sure if I've missed the point, but good forensic software can parse grammatical structure and use that. The English language has enough flexibility for every person to have a unique grammatical flavor. And that probably extends to each document as well. If you want obfuscation you really need something that can do heavy simplification.