#1 piston fighter?

By the way, what is generally known about the fighter pilots of French
air force who shot down quite a few Germans (Moelders among them) in
English language works? It's always RAF, RAF, RAF until Pearl Harbor.

That's how it works. In French works, you get a predominance of French heroes;
in Russian-language books, its nearly always leaned toward the Great Patriotic
Struggle, "and the Americans did some bombing as well, after the Soviets
crushed all German resistance." Historical writing, in general, is weighted
toward the heroes that spoke the same language as the author and the intended
readers. Go into an American bookstore and you'll find rows of books on US and
British aircraft and airmen and a lower percentage of titles about other teams.
Its nature, not a slight against the heroic, brief stand of the French Air
Force.

v/r
Gordon