General Brazilian
áreas marginais
Standard usage in Brazilian Portuguese, often referring to urban peripheries and socioeconomically disadvantaged regions
Rio de Janeiro
áreas marginais; periferias
Commonly used interchangeably with 'periferias' to describe favela regions and outlying neighborhoods
São Paulo
áreas marginais; regiões periféricas
Often refers to suburban regions on the city outskirts with limited services
Portugal
áreas periféricas; zonas marginais
More formal usage; often used in geographic and administrative contexts