You still have choices.
Variable names are pretty free form.
A switch statement or if/else might be a choice that achieves the same thing. Waffling between them would be highly suspect, since a person isn't going to be so wishy washy. So you could use structural choices too.
AI code tends to look more obviously AI than prose anyway.
Yeah, but you'll have to submit to every known provider and hope the user used one of the ones that provide this checking service, and didn't do something like ask a local model to just randomize synonyms in a text.