"Well, there's one for strangers, and one for people you haven't met before but you know of them, and one for people who you might not be sure if they're who you think but it doesn't actually matter for the interaction you're having, like for public officials, since as long as they have what you need to copy it doesn't actually matter if they're the same person as yesterday. And any time you're meeting someone you know, you shouldn't just be using a regular greeting, you should be saying a phrase the two of you agreed on or referencing an inside joke or asking about an episodic memory you already know they have." They list the relevant words.
"It's a lot less bad here than some places because it's super illegal to impersonate someone intentionally and everyone's at least a minimum amount of nice. But everyone still does it; I think it might be a bit of a holdover from before things were like that."
" - Well, and that foreigners are allowed in most of the rest of the country, and they don't necessarily have minimum amounts of - do you really want to translate that as just 'nice'?"
"It's close enough, isn't it?"
"I suppose so."