It was originally meant for TV Happy/TV Košava, thus the credits, I guess. Or maybe they did, in fact, create subtitles.
I will post them on Wayback Machine once everything's up. I uploaded the first episode just for the curious ones.
I guess that the subtitles were done in 2009 or 2010 because in 2010 they changed the name from tv Košava to happy. Also it seems like that ideogram was actually owned by happy, so that's why it dosen't say ideogram. And yeah they probably did make the subtitles.