The novel chapters at the end don't quite fit. Or are there several novel variants?

The novel chapters at the end refer to bleakrubys translation on novelupdates. They probably wont fit other translations.

Are the translations good? I found some others, but the translation is so bad. Probably automatic and not even original language to English, but through Russian in between. It's so so bad T.T

Yes! Its the best novel translation of dash out there. I definitely recommend reading bleakrubys version.