Would we really be speaking German?

Sometimes people don't remember, or confuse history's timeline of events. I will use a WW II occurrence to make the point.

Hitler shot himself in the head, and took cyanide simultaneously on April 30, 1945, in his Berlin bunker. Why? The Russian forces were approaching. The Russians had already done much damage to the Nazis in 1942, in the Battle of Stalingrad.

Some say we'd all be speaking German if the Americans didn't get involved in the war. The reality is that we'd probably all be speaking Russian, if not.