The situation is complicated on territories of former of USSR.

In Belarus and Ukraine so many people speak Russian because people were subjected to russification for centuries. But we know our origins, culture, traditions.  We know our history. We can trace our ancestries .

There are regions such as Transnistria, northern Kazakhstan, the far east of Russia (Vladivostok & Khabarovsk) that were settled by  different people such as Estonians, Volga Germans, Russians, Ukrainians, Tatars , Siberians and everyone else one can imagine. Those people assumed Russian identity speaking Russian language. They are a part of the Russian world as Russians say.

But they have short history having mixed origins. I guess they are Russians. To me ethnic Russians live in regional Orel, Belgorod, Briansk, Pskovk, Vladimir, Voronezh, Kaluga, Lipetsk, Tula.