Maybe 'La Banks' is a place and there is a story associated with a monster there. Without more context, it's difficult to say exactly what the story entails. It might involve the people in La Banks dealing with a terrifying monster that threatens their community.
La La Land isn't based on real events. It's a creative work that imagines a charming and artistic story. The characters and their experiences are crafted for entertainment.
La Malinche was a central figure in the story of the Spanish conquest of Mexico. She was a Nahua woman. When she came into contact with Cortés, she used her language skills and knowledge of the local area to assist him. She was both a victim of the conquest, as she was taken from her own people, and a facilitator of it, which makes her a very controversial and complex character in history.
The struggle of artists in a big city like Los Angeles is an aspect. Just like in real life, the characters face numerous rejections and difficulties in their pursuit of their dreams in the film industry.