A lot of words are overloaded, across domains as well as within domains, that is not ideal but also no unsurmountable problem, you can always clarify your usage by providing definitions. There is certainly not much of a point to explain things in precise and correct terminology if this prevents the intended audience from understanding you. On the other hand, people aware of the technical details will have no big difficulties to understand something despite simplifications or inaccurate terminology.

I am actually not even sure whether zero-knowledge is not technically correct here. Terms like zero-knowledge proof or zero-knowledge protocol have very specific meanings and certainly do not apply here, but is zero-knowledge on its own really used for something more specific or other than not leaking knowledge? I also immediately thought of zero-knowledge proofs and protocols but nothing like that is mentioned anywhere, at least as far as I can tell, so it was kind if my mistake to read something into it that was not actually there.

EDIT: Zero-knowledge seems to indeed have a very specific technical meaning on its own [1], at least in the context of zero-knowledge proofs.

[1] https://en.wikipedia.org/wiki/Zero-knowledge_proof#Definitio...