A veréb is madár (1968)

A comedy about two twin brothers - Sándor, who emigrated and became a rich man, and Zoltán, who stayed in Hungary and lives the life of an average working-class man. When Sándor visits his twin brother, they are constantly mistaken for each other, and when Zoltán sees how differently people treat Sándor because of his money and his foreign citizenship, he begins to like being mistaken for him - until he realizes that this means he will lose his girlfriend Szöszi...