Liliom paws at Julie's breast while they sit together on the park bench. He is obviously out to seduce her.
Later, Liliom and Alfred go to an establishment which is very obviously a whorehouse.
Violence & Gore
Unrated
Liliom has slapped Julie before, but this has not been shown. He slaps her again onscreen when she serves him coffee and it is not warm enough for him, and she tells him off. (This does not occur either in the original Molnar play nor in the musical version, "Carousel".)
Alfred pulls a knife on the man that he and Liliom intend to rob, but the man has a gun and is ready for them.
Profanity
Unrated
Liliom supposedly uses the word "bastard", but since this is a 1934 film in French, it is difficult to tell.