What would make a story feel more realistic to reader in south America?

Include details about the local culture and environment. This could include descriptions of the landscape, the weather, the food, the music, and the people.

Use characters that readers can relate to. The characters should have realistic motivations and emotions. They should also be from different social classes and backgrounds so that readers can see a variety of perspectives.

Use authentic dialogue. The characters should speak in a way that is natural and believable. They should also use slang and expressions that are common in South America.

Include references to current events or historical events. This will help to ground the story in the real world and make it feel more relevant.

Avoid stereotypes. South America is a diverse continent with a rich culture. It is important to avoid falling into stereotypes about the people, the culture, or the region.