A scary El Salvador story is that of the Xtabay. It's said to be a female spirit that lives in the jungle. She sings a beautiful but hypnotic song that draws men to her. Once they are close, she either kills them or drives them insane. This story was often told to keep people, especially men, from wandering too far into the dangerous and uncharted parts of the jungle, as the unknown held such terrifying entities.
Well, it's hard to say for sure. You'd have to look into the background and the creator's statements to determine if it's based on actual events. Sometimes what seems like a true story could have a lot of creative liberties taken.
El Deafo is indeed a true story. The author drew inspiration from her own childhood and experiences with hearing loss to create the narrative. It offers an authentic and heartfelt account.
Not necessarily. 'El cantante' could draw inspiration from real-life, but it's probably embellished or fictionalized to make for a more engaging story. There might be some truth at its core, but it's not a straightforward account of actual events.