>>7186812really? that's neat. russian has a lot of lexiconal overlap with bulgarian and the main difference is in grammar and pronounciation. personally i really like bulgarian as well because it has no cases, unlike every other slavic language. i imagine that would make it difficult to learn if you're studying russian at the same time though.
feel free to come to sofia but imo there's more to see outside of sofia, this city is pretty boring. veliko tarnovo, troyan, tryavna, etc are much more enjoyable and comfy