Here are some ideas that could improve the language level:
i suggest to change the final chase mechanic, theme and atmosphere for Marzia .
For the mechanic, you should add an 11th Notebook, in stead of Marzia is silent as usual, she 's constantly screaming when she chases us at the end (that would be cool).
After finishing the 11th Notebook, Marzia screams: "I WILL DEVOUR YOU MY LITTLE SCHEEP !!!! COME MY ANGEL !!! and then she constantly screams "COME MY ANGEL !!!!" until the player run to the elevator to escape and win the second level of the game.
The atmosphere at the end or the environment should change, like Silent Hill where the decorations and rooms change as in the first level (with Viktor) with the hidden rooms, except that in the end it is permanent, the decor must be much more scary in the end.
I suggest this theme for the final chase with Marzia :