It is true, if you say "RPC" I'm more likely to assume gRPC or something like that. If you say "REST", I'm 95% confident that it is a standard / familiar OpenAPI style json-over-http style API but will reserve a 5% probability that it is actually HATEOAS and have to deal with that. I'd say, if you are doing Roy Fielding certified REST / HATEOAS it is non-standard and you should call it out specifically by using the term "HATEOAS" to describe it.