How did the line of demarcation affect present day languages in South America?

The Line of Demarcation, established by the Treaty of Tordesillas in 1494, divided the New World between Spain and Portugal. As a result, Spanish became the dominant language in most of South America, while Portuguese was established in Brazil. This division has led to the distinct linguistic landscape seen today, where Spanish is the primary language in most countries, while Portuguese is predominantly spoken in Brazil. The historical context of colonization significantly shaped the linguistic and cultural identities of the region.