Spanish is a beautiful language, no matter the dialect. Mexican Spanish in particular is the one I'm accustomed to hearing the most (being from Texas.) I love the husky quality of a slow speech in a Mexican film, especially when you combine it with the crackle of old cinema, and the eery atmosphere of shadows created in a black-and-white picture. Combine that with angry witches, curses, mirrors...you've got yourself an incredible picture.
On a dark night, preferably a rainy one too, watch this one by candlelight. Keep your phone off. Don't let anything distract you...and soak it in like a bath. It's how all true horror should be experienced, especially dark classics like 'The Witch's Mirror', which tells the story of a witch...obviously...who tried to protect her god-daughter, but failed...and seeks vengeance on the young woman's husband who murdered her through the power of the same magic she had tried using for good.