So I got curious and attempted to translate the Japanese Palutena's Guidance for Rosalina using that method I used for that 30th Anniversary Mario Encyclopedia.
The online translators give me a load of gibberish mostly, so I couldn't even understand half of it. But I was able to make sense of a few things:
-Palutena definitely calls Rosalina "the witch of the Comet Observatory"
-Viridi definitely replies with something along the lines of "Hey, hey! If she's a witch, that'd make you a witch too!"
-Pit appears to wonder what the small star thing with her is. Palutena tells him it's called a Luma. Viridi then references the storybook, saying that Rosalina once traveled the universe just to help a Luma find it's mother.
-I think Pit then comments on Luma looking weak or something. Viridi replies calling him an idiot (she says "Baka!" which I know is Japanese for "idiot", that's something you can clearly hear), and says something about Luma. Pit then replies with some kind of shocked expression, which is interesting as it isn't used in the English version of the conversation (you can notice throughout that the order of speaking and what not is different to the English version):
-I can't really make sense of it past that, but I think Palutena mentions that Rosalina can summon as many Lumas as she wants or something like that, at one point. Also something about the Lumas always being willing to fight by Rosalina's side, like the English version.
Here's the Japanese text if anyone wants to use it: