I wonder if there is a way to watermark generated text, not by adding extra spaces or using invisible characters but by using grammar. Example naive rule “every

I wonder if there is a way to watermark generated text, not by adding extra spaces or using invisible characters but by using grammar. Example naive rule “every 13th word MUST be a proposition”. Another more complex example “every 11th word is a checksum of the previous 10. You encode a few bits in every word i.e noun=1 verb=2 article=3 etc”