Grubas, while you're correct in observing that there's no such thing as a "Slavic accent", ALL Slavic languages have certain charactaristics in common, much as do all Germanic and Romance languages etc.
BTW, how can one fully define persons, nations who call themselves "Slavs/Slavic nations", only by the language they speak?
The question is in this connection that today I have read a WIKI article about the Kazan Tartars trying to revive their ancient name Bulgaria (Volgaria). So, the related question: Suppose they join the European Bulgarians (, build a sort of confederation with them) and accept a Slavic language as their native one as well, would they be a Slavic nation too?
Still another question: Why do we use the word "Slavic" in English, but not a word like "Slovian" (or Slovic)? According to the article (an abstract from which see below) + many others, the word Slav/Slavic is connected rather with the word "slovo" ("word"), and more to it: there are countries that have the root "slov" in their names: Slovakia, Slovenia. Could one introduce it into use in English?
Origin of the word Slav poland-claritaslux/blog/origin-word-slav/
What is the origin of the word Slav? The Slavs or Slavic people are obviously most of the people of Eastern Europe, the Poles, Czechs, Slovakians, Ukrainians, Russians, and Serbians etc. Their languages and cultures are very similar.
The word 'Slav' or 'Slowianin' comes from the Slavic term for word; 'Slowo'. 'Slowo' means 'word' (słowo in Polish letters but pronounced swovo). The Slavs identified themselves as those who could understand their word or language. Slavic could be interpreted as "someone who understands".