What do you expect people to talk about when they're forced to only one thread for....let me think what... Aw, yes, for EVERYTHING?!
Works pretty well for everyone else, saying they aren't here because of that is not true in my experience. Almost all the foreign language boards started out as a single thread, and as their needs grew, so did their space. This isn't a Kevin Costner movie, just because we make it doesn't mean they're going to come. There is no or very little interest by Bulgarians, or if there is, there is no posting about it. So no section is necessary.
If that means you can't post about altcoins here, then that's what that means. This is a Bitcoin forum, it's already difficult enough to try and accommodate international Bitcoin users without worrying about the altcoin of the week too. There's minimal support by the forum for altcoins here, even in the dedicated sections, including English. If you don't have a dedicated section for whatever reason (which I covered already), then you shouldn't post it. Sorry, but that's the way it is.