Why I have not played SoG yet

[Пилот]

Actually, there is ".rs" (internet domain for Republika Srbija) in flag's left side lower angle.

But, guys, I don't mind such mix-ups a lot

Russia has same colours as we do, but in reverse order (white-red-blue). Same order as Russia have Slovenia and Slovakia. Those three colours are, basically, popular among the Slavs. Croats have red-white-blue tricolour, Sorbs blue-red white, and Czechs white over red with blue triangle at left hand side. And Poles have only white over red bicolour.