I had to choose between American and British actors, and it didn't take me more than a second to decide: Russians are Europeans and should be played by other Europeans.
My way of remaining French was the financing scheme I used for Quest for Fire, with Fox funds, since it started as a 100% American production. The film was not in French and yet was French in style, reflecting my personality.
There is a broad cultural current that conveys the idea that a film is like a football team, it represents a nation, it is illustrated literature, filmed radio. These are outdated concepts, totally out of touch with today's realities.
When Picasso painted in Paris, was he a Spanish or a French painter? It does not matter, he was Picasso, whatever the influences surrounding him. He simply chose Paris because it was the ideal place for him to sell his creation.
Today's cinema is a global art form, it is impossible to make movies for a market the size of France, representing no more than 4% of the world's total.