I like the films of the 30s quite a bit. They were trying so hard to be Hollywood, and made some impressively entertaining films.
One of the best is"Congress Dances" (1931). It is a light musical farce that stars Lilian Harvey and Conrad Veidt. There is an amazing scene in which the big hit song from the film is magnificently shot, following a young girl's carriage ride through the streets of Old Vienna to an elaborate villa in the country.
The film was made simultaneously in three languages. Lilian Harvey played in all three versions. She was English, but raised in Germany from the age of eight. She attended school in Switzerland and spoke French too.
Not only was she a great star, but it was economically advantageous to not fit three different actresses to costume for the various versions.