Well, I would find "Earthling Jenneth" creepy as hell
Usual honorifics most of the time are versions of the word "master" and show your submission to authority or rank of the person you addressing. The variation of "comrade" is a way to show respect, while stating that all peoples are equal.
I think there should be another word for showing respect between Achura, than stating what planet they came from
Actually, this is a minor issue I have with Napanii as it currently exists. The Caldari aren't about egalitarianism in any form; they're about hierarchy, ideally meritocratic. Their "castes" may be somewhat loose, but they are definitely hierarchical.
But, let's say for the moment that the Caldari all refer to each other by the titles "-haan" or, in places, "-haani" for women, unless a person has gone and done something to earn a different title (-suuolo, -guri, -hnolku, etc.). That seems to be accepted practice, so let's accept it and go from there.
Is an ethnic Achur who is culturally Caldari a full Caldari citizen? Absolutely, so "-haan" it is.
Well, how I imagine this "egalitarianistic" behavior of Caldari - as a result of mixing of Deteis and Civire cultures into one. And when you say "haan(i)", you mean, that you treat the person as your friend, as one of
your own people, even if said person is not. A Civire is a haan(i) to Deteis, just like a Deteis is a haan(i) to Deteis. And Deteis is a haan(i) to Civire, just like Civire is a haan(i) to Civire.
So, when a Deteis says "haan(i)" to Achura or any other ethnicity, Deteis means, that this Achura is a comrade, and should be treated as other Deteis, "you are like me, you are one of us, and we will show you respect as one of us".
Same way, "-jaijii" would mean "you are not one of us, and don't expect respect here".
Is an ethnic Achur who is culturally Achura a full Caldari citizen? Absolutely not. Such a person may be "equal" by some standard and has some legal status, but does not have the same privileges (cannot, for example, live in a Caldari community), cannot claim corporate citizenship under any corporation, and is certainly not "one of us."
From my point of view, polite Caldari should still call this Achura "haan(i)", if this Achura is welcomed, even if this person is not "one of us" culturally, but hasn't done anything disrespectful.
That's not necessarily a very negative or, if it is, a very permanent judgment-- a cultural Achur is Achur by choice, and can choose to adopt Caldari ways and culture and become fully Caldari. Every single Achur capsuleer either started out culturally Caldari (rare) or has, at some point, done so. However, it's not a quality that grants equal status within the society; I'd compare it more to being a member of a protected species that can render itself fully human ("one of us") with appropriate effort.
Well, Achur who is Achur by choice might prefer to be called with honorific, that other Achur use for each other. For example, if Ryeon-achur would prefer to be called this way, you will show respect by satisfying this request. But otherwise, I still think, that Caldari should call them still "haan(i)".
As for how one Achura should call another - I have no idea. "-achur" sounds for me a bit weird
That being the case, I'd say the use of a title denoting nation/planet of origin is practical and reasonable, considering that the Achura occupy a domain that is neither Caldari nor outsider nor non-entity. It's like calling the residents of the Intaki system Intaki or the people of Gallente Prime, Gallente.
Ugh. It sounds more like weird, creepy and disrespectful for me. Of course, we call Intaki those, who are from Intaki, Gallente, those who are from Gallente, say, like Americans who are from America, etc. As for me, it would be verrrryyy verrryyy creepy for me, if someone would use constantly "Earthling" as honorific while addressing to me. And for other countries, say, if american John Smith will visit United Kingdom and will be called "American Smith" instead of "Mr. Smith", I think it will be rather discriminative than respectful, because you will accent on Smith's difference from other peoples, telling him that he is not one of them.