Southern Brazilian Portuguese is organized into several documented speech areas: northern and central Paraná zones, Rio Grande do Sul corridors, an Azorean-Catarinense coastal zone, transition zones across Santa Catarina, a southern border zone and bilingual contact areas. Their histories include Azorean-Madeiran settlement, cattle-driving routes linking paulista and gaúcho communities, internal migration, Portuguese-Spanish frontier contact, and German-, Italian-, Polish- and Ukrainian-speaking settlements.
These histories remain audible in specific features. Tu is frequent in Rio Grande do Sul and several Santa Catarina communities, with locally different verb agreement; syllable-final retroflex r is strong in Paraná; Portuguese-Spanish contact contributed words such as bolita and pandorga; and Italian-contact communities can use a tap where other varieties have a strong r, as in regional pronunciations of carro and terra.