RIOT IN A WOMEN'S PRISON (1974)

 This women-in-prison flick might have some of the tamest rioting ever in a film like this. These gals tend to just like throwing foam-rubber mattresses around wrasslin' with the guards(who seem to be mostly nuns). Unfortunately it also has some of the worst dubbing ever. Everyone talks super fast with an accent to make it even harder to understand. There's some nudity, of course, and the requisite shower scene happens but little in the way of any real action up until the midway point. A dog winds up getting hanged in what's the most brutal scene to anyone who likes dogs, a girl's head gets busted open in a rare bloody scene and it all kinda ends rather blandly. This doesn't really seem like something made around 1974 and seems closer to something from the 60s(which is an idea even more reinforced thanks to a few hippie characters that show up early on) Not on the best examples of this normally more sleazy sub-genre.  AKA EROTIC CONFESSIONS FROM A WOMEN'S PRISON
 There is a French release of this(titled PENITENTIARY FOR PERVERTED WOMEN) with lesbian porn spliced in for added sizzle!

Known in Spain(and Italy) under the super generic WOMEN'S PRISON title: 

            France gave it the way snazzier title of PENITENTIARY OF PERVERTED WOMEN!: