Is being communist purely defined by self-identification here then? Even if their system has little to no resemblance to those advocated by Marx, Engels, Bakunin, Kropotkin, Proudhon etc?

@TheAllMemeingEye I’m outsourcing that to Wikipedia. If you can convince their editors, the market resolves along with it

By communist country, you mean a country where the ruling party is a communist party?

Yes, per the resolution criteria above