I'll be glad to help, but I can only understand Danish and English well enough to get around. I might be able to get into the Swedish and German sites and post stuff about those since the dialects are similar though, so I will try that now and add an EDIT when I do.
I know these aren't German or Swedish, but....I was able to somehow get these. XD
This is the Italian version from Panini Comics. I can't understand Italian, but I could see they had volumes 1-21 available.
The Finish version from Sangatsu Manga. I believe they have 1-20 volumes, with 21 to come.
I looked up all the countries that had the possibility of publishing them and dialects similar to Danish I could understand (German, Swedish), and those two were the only ones who sold them in their own language, not in English or Japanese.
Also - I don't know if these are needed, but here is a basically updated version of the first post:
Japanese Tankoubon: From Square Enix
English Volume books (North American version) : From Viz Media
Portuguese (Brazilian version) : From Editora JBC (Japan Brazil Communication)
Won't let me bring over the cover, so see here
for the first volume.
The Brazilian version has the chapters published into 43 volumes, and the covers are neat to look at because they are taken from chapter pages and novel covers, and there are actually one or two I've never seen before, such as vol. 12
Polish (Poland version) : From JPF (Japonica Polonica Fantastica)
French version: From Kurokawa
Finn version: Sangatsu Manga
Chinese/Singapore version: Chuang Yi
Danish version: Carlsen Manga
Swedish version: Panini Comics