It includes loanwords as well, it’s a general dictionary, and everybody can contribute. I am the top contributor right now, and I’m adding South Slavic words primarily. But as I have noticed it seems that the language with the least number of words is Belarussian…
So I guess we’re in a big need of Belarussians, mates. Also Slovenian. Belarussian and Slovenian are actually the only 2 Slavic languages I don’t speak at all xDD but I understand them fully
But all Slavs are welcome. Also non-Slav speakers of Slavic languages.
But please don’t use dictionaries, but rather contribute with the languages you actually speak. That would be preferable.