The Blue Angel (German: Der blaue Engel). The film was shot simultaneously in German- and English-language versions. Though the English version was once considered a lost film, a print was discovered in a German film archive, restored and screened at San Francisco’s Berlin and Beyond film festival on January 19, 2009. The German version is considered to be “obviously superior”; it is longer and not marred by actors struggling with English pronunciation. Simultaneously shot in two versions (English and German) with the same cast; the German (with English subtitles) version is more popular because of the heavy German accents of the cast in the English language version.
Prim educator Immanuel Rath (Emil Jannings) finds some of his students ogling racy photos of cabaret performer Lola Lola (Marlene Dietrich) and visits a local club, The Blue Angel, in an attempt to catch them there. Seeing Lola perform, the teacher is driven mad with lust, eventually resigning his position at the school to marry his beloved. However, married life with a woman whose job is to make men desire her proves more difficult than Rath imagined. More on Wikipedia
Watch The Blue Angel/ Der blaue Engel (1930)
German Version (English subtitle)
English version