Parents Guide for
The Witness (1969) More at IMDbPro »A tanú (original title)

There is no sex or nudity in this film. At one point, there is some discussion between a father and daughter about what she might have done with a man they know, but there is nothing explicit about the talk.

No violence, though there is an off-camera slaughtering of a pig.

None in the English subtitles that I recall. I don't know Hungarian, so it's possible there was some left untranslated.

Fair amount of smoking--not surprising, given the time and place.

Some men go through a ride called the "Socialist Ghost Train" which has screaming and some bizarre imagery, though it's fairly mild and lasts only a few minutes.