I wish to identify a horror/thriller movie that I saw in 2010/2011.

So I saw this movie Horror/Thriller on World Movies(the TV channel) in 2010/2011. So the movie was definitely released prior to that. I think it was definitely released after 1995. It wasn't a Hollywood movie. I think it was either German or French but it could be of any related language. The only details I remember are as follows: It involves(I'm not sure if this is the main plot) a girl who was left in a forest/jungle and she then develops tarzan/animalistic tendencies. She is later found(?).  Also there is a flashback scene which involves the girl(maybe not the same girl) witnessing her mother(who is in the kitchen) get molested(groping etc) by her father's friend(?). The girl's father also happens to be there with her and tries to cover her eyes with his hands(so that she doesn't see too much). The guy(who molested her mom) has a hunting rifle/shotgun and he shoots her father as soon as he sees them. The girl survives however.

Also in the ending a girl is seen making a chimpanzee/gorilla like sounds. She also has a rock in her hand. I know this is all too vague to be of any help but I hope you guys figure it out. Thanks in advance!