If there's only one Bulgarian thread you shouldn't be cluttering it up with altcoin content.
Well, in that case, on behalf of the Bulgarian comunity in that forum, we would like to have a dedicated section.
If the forum administration consider that as inapropriate due to a low count of members, then a Slavik languages section could serve the Bulgarian, Russian, Serbian, Croatian, Check, Polish, Slovenian, Slovakian, Macedonian, Montenegrian, Ukrainian, Belorussian members of the forum. And of course, it would be appropriate to create a sub-section for every language plus a moderator crew, having a clue of these languages.
The comunity from the aforementioned countries is quite bigger than the e.g. Portuguese speaking one (Portugal, Brasil, Mozambique, Angola, Macao, Goa), the Hebrew speaking one, the Greek one etc.
Consider this message as an official request.
This is the only real solution, using the only Bulgarian thread here on a Bitcoin forum to promote altcoins is not reasonable, but then again neither is cluttering up Other with a ton of threads for alt coin translations for a ton of different languages (many will do it for the bounties, even if not you or the OP). It's still a Bitcoin forum. Bulgarian thread only has 9 pages since it's conception in 2012, so probably not worth it for that. Some of the countries you mentioned already have dedicated sections as well. There may be a better solution we haven't thought of yet.
That doesn't change anything, you may not be the translate for bounties spammer type, but others are.
Why are you NOT deleting post about new coins from Russian?
From Greeks? From Turkish? From Romanians?
Because they have an altcoin section within their respective forums already.
We aren't trying to limit anyone from talking about an altcoin, we're trying to limit the altcoin spam in Bitcoin sections. Look at the big picture instead of rushing to play the martyr. If we let you promote altcoins in the Bulgarian thread, then there will be many others who do it as well since they'll be getting paid for it. Same for posting in Other or English Alt Currencies, except 20 times as worse.