Well, post doesn't say France is totalitarian. It just say with some POD France attacked together with its allies in Central Europe.
Even if British could feel upset a bit over France domination of continent, they will do nothing. France dominated continent after WWI OTL and actually with British help. Poland, Czechoslovakia, Romania, Yugoslavia had military treaties mostly with France and modeled their militaries after French army.
To change British position so dramatically much early POD is necessary. British early after WWI allying with Weimar Germany, pushing for lower reparations as a response for France domination of continent.
US would care even less as US-French relations were pretty good. French would need to be stupid as Hitler to get on US wrong side.
Polish and Czechoslovak relations were also good due as WWI allies and as big minorities from these two countries were living there.
For France - Polish - Czecholsovak alliance to loose the war you will need Soviet intervention.
France and Czechoslovakia had pretty good relations with Soviets. Polands were worst, but if Soviet didn't threaten them, they have no reason for military actions against them.
But let say it happens. So you will end up with half a Europe communist as OTL.
On other side. I do not know how will Germans look on Soviet liberating them from under French occupation.
It will take Hitler stupidity level to start a World War,
Us France relation was pretty good OTL,but so was UK relation with US.
Presumably Germany will be liberated by the allies,partisans,free German,army and the soviets,it will give a boost to German communist,the soviets participation in the war other then that nothing will change.
As for half of Europe becoming communist it depends on how much of it is involved in the war.Poland,Czechoslovakia yes if the Soviets,not so sure about the rest especially if they remain neutral,ok the Baltic countries might get annexed,Finland and Romania might lose some territory but this does not mean they will turn communist