@CarmillaKriegstein
I can admit I was not entirely right, but I think it is safe to say its a bit of a grey area. Also I did do some basic research:
https://en.wikipedia.org/wiki/Crown_prince
So by traditional standards I would be correct that the "Crown" part of the title denotes the heir apparent which these princess would very much not be. However by modern standards the "Crown" title is conferred to the spouse as a matter of courtesy, but holds no real meaning beyond that. So I guess it will depend on what standard you want to go by. Monarchies aren't really a very critical part of modern societies anymore, so I would say these distinctions are not that important anymore hence the more relaxed application of this title.
However in the past I would be willing to bet such distinctions were much more important for prestige and would very likely carry a large amount of weight in the court. It is going to be a matter of context here. Is this alternate world with modern sensibilities but older technological levels or is it simply a fictionalized past? Maybe something else entirely, who can say besides the author? Matters of court titles are extremely strict is most all cases, so the distinctions would matter, but I mean honestly I doubt even the author thought that deeply about the hierarchical structures that would be of importance here. If he did, the MC wouldn't even be a maid as that would be highly unlikely given her status. So we continue suspending disbelief.
I can admit I was not entirely right, but I think it is safe to say its a bit of a grey area. Also I did do some basic research:
https://en.wikipedia.org/wiki/Crown_prince
So by traditional standards I would be correct that the "Crown" part of the title denotes the heir apparent which these princess would very much not be. However by modern standards the "Crown" title is conferred to the spouse as a matter of courtesy, but holds no real meaning beyond that. So I guess it will depend on what standard you want to go by. Monarchies aren't really a very critical part of modern societies anymore, so I would say these distinctions are not that important anymore hence the more relaxed application of this title.
However in the past I would be willing to bet such distinctions were much more important for prestige and would very likely carry a large amount of weight in the court. It is going to be a matter of context here. Is this alternate world with modern sensibilities but older technological levels or is it simply a fictionalized past? Maybe something else entirely, who can say besides the author? Matters of court titles are extremely strict is most all cases, so the distinctions would matter, but I mean honestly I doubt even the author thought that deeply about the hierarchical structures that would be of importance here. If he did, the MC wouldn't even be a maid as that would be highly unlikely given her status. So we continue suspending disbelief.