> a mirrored portrayal of Soviet society and WWII.
The Soviet Union did not have WWII. They had the Great Patriotic War of 1941-45.
There is a difference there.
The Soviet Union invaded and annexed half of Poland in 1939 - in partnership with Germany.
What's the difference? They were involved in what is colloquially known as WWII. They just refer to their specific part differently amongst themselves, but they certainly did have WWII.
It's called a world war in english because everyone and everywhere was at war during that time. Pretty much every group has a name for it in their own language.
We used both terms, the WW term meant the overall event and the other one was for the Soviet part that started June 22, 1941 and ended in 1945, first in Germany, the main victory, the in Far East in the war with Japan. The term itself is taken from to the war of 1812 with Napoleon; that one was The Patriotic War. The Finnish war has its own name. The Poland operation is not counted as a part of the war.