Not that much harder to implement. You could automate that too with some basic text substitution. Eg replacing various instances of "and" with ampasand or plus

Not that much harder to implement. You could automate that too with some basic text substitution. Eg replacing various instances of "and" with ampasand or plus sign. You could also vary joined words like "without" / "with out", and alternative between the types of quotation marks used (as there are several in unicode). And this is without breaking into more intelligent heuristics where you swap out synonyms ("more intelligent" because you'd need to be careful not to alter passages that need to be kept verbatim, like quoted text or where a synonym might alter the context of the sentence.but with a little care I think that is achievable as well)