It was a remake of a silent movie,and a remake that made sense for it was based on Edmond Rostand’s play so it is necessary to hear the actors ‘ voice .”L’Aiglon” has not worn as well as “Cyrano De Bergerac” which made Gerard Depardieu an international star. More on Wikipedia
Watch L’aiglon/ English: The Eaglet (1931) French Film
No English subtitle