What are poor areas that house people from similar cultures called?

Slum is the correct answer.

Explanation:

A highly populated urban residential area which consists of packed houses and incomplete the infrastructure is known as slums. Mostly impoverished persons inhabit the slums. They are of all sizes. Most of the slums lack sanitation services, clean water, law, electricity, law enforcement, and other basic amenities. They can contain shanties or can have poorly built houses. The slums developed during the 18th and 20th centuries in Europe and the US. According to a recent UN-Habitat report around 33 percent.

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