And I'll Run to the Ends of the Earth(1980)

Majka "Chatterbox" is a girl entering adolescence. She was born with a minor disability. While her mother keeps scolding her for the way she walks, her classmates mock her and call her a "duck". Along an innocent first love affair and a secret friendship, she receives little understanding from her parents and lots of malice from her schoolmates. Majka finds refuge with her grandmother and in her own fantasy world.