[riffraff]

while I don't have access to another timeline, russia, china and (to some extent) france did win the war, but none of their language became a new lingua franca.

I'd suppose the closest thing to a nazi-controlled-germanized-europe would be the USSR (people escaping, restrictions on freedoms hindering creativity, no colonies speaking the same language, trade issues with the rest of the world) which in fifty years failed to establish a linguistic dominance even in aligned countries.