Almost King (1977)

Handsome, clever, hedonistic youngster Honza (Czech for Hans) always enjoys his lazy home, but his mother convinces him to go out into the world to gain experiences. The main prize is offered by the king; half his realm and her hand for whoever gets his spoiled-rotten daughter to talk again. Honza proves quite resourceful talking people into things, making friends by doing favors. He has a crush on farmer's maid Marjánka, so gets hired by the stingy farmers, whom he outsmarts every time. Even the royal guard has a hard time chasing and catching the last man who boasted he can loosens the brat princess's lips, which he only manages when his future looks desperate.