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.
Well, El Cid has a basis in history. Rodrigo D铆az de Vivar was a real person, but the stories about him have likely incorporated fictional elements over time to make them more captivating.