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 These are outdated concepts, totally out of touch with today's realities.
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.
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.