and I try a lot of keybinding... Or did I miss something ?

Do I need to kill the capybara guard too to unlock this achievement? If so, how? Or am I missing another animal, even tho' I've searched high and low and got to grips with the game world?

Bloody room with the rabbit painting at the end is what im referring to. is there a use to this room and the skulls or am i stupid?

How do I change the language?

I cheesed this by getting it stuck in a corner and spamming shots, I feel like I wasn't understanding something about the game doing that though. Am I meant to have stronger weapons or are there movement techs I am not understanding?