Ecash is OG, it should make a comeback. However, I've always disliked "ethical hacker." First of all, for even the whitest of white hats, hacking is frequently gray behavior. Calling it ethical hacking feels like asking permission to hack something. Which, to your point, they might as well call it "cyber hacker" because it's lame.

There's no ethical plumber and "ethical banker" is equally ridiculous. So I just like to say hacker and let the cards fall as to the ethics. In Slovak, eticky hacker does seem to be the most understood term I've noticed (for me) unfortunately.

But when I'm dressing up, I use "security engineer" which for me, coming from a classic engineering background, is an apropos term I think.