Brazil Spanish speaking = unified South America?

Perhaps a pod is that the Iberian union is maintained and Castilian becomes the main language. It was already the language of the Portuguese Court. There are also many other possible pod's
 
Given that the Spanish-speaking part of South America isn't unified, I don't think a Spanish-speaking Brazil would be enough to change things.

Keep in mind that there can be major differences in ethnicity from one South American nation to another. For example, Bolivia has an indigenous majority, and Peru a sizable minority, while Argentina and Uruguay are overwhelmingly of European origin. Also, indigenous languages such as the Quechua family and Guarani are spoken in some parts of the continent but not others. The fact that these countries officially speak Spanish does not mean they are culturally unified.
 

Zlorfik

Banned
Given that the Spanish-speaking part of South America isn't unified, I don't think a Spanish-speaking Brazil would be enough to change things.
This
Also, brazil was already portuguese-speaking by the time of the iberian union. It'd take deliberate effort to change that, for minimal reward
 
Chances are, in a situation where Spanish came to be the primary language of Brazil, Brazil itself isn't likely to be unified. Brazil was really tied together as a single nation due to the relocation of the Portuguese court to Rio de Janeiro. Before the arrival of the Portuguese Court, "Brazil" was really a just a couple of contiguous colonies rather than a truly unified entity (Brazil was under the same Viceroy, but look at how the Spanish Viceroyalties turned out). Something similar almost certainly won't occur in a timeline where Brazil is Spanish speaking, given the butterfly effect. Without this unifying presence, Brazil has a strong potential to balkanize upon Independence (given that even IOTL there were a number of separatist attempts).

This of course assumes that Spanish speaking Brazil would have the same population structure as Portuguese speaking Brazil in 1820, which isn't remotely assured (and thus changes the dynamic of things quite a bit). If Spain colonized Brazil by itself, the population of Brazil would be quite a bit lower (Portugal sent more colonists to Brazil than Spain sent to her entire empire), and spread out differently.
 
POD should be the treaty of Torsesillas

Even with Portugal-and Brazil- speaking Spanish, I doubt Brazil would ever unify with any other South-American countries. Just the fact that Brazil was colonized by the Portugese empire made it so different from the rest of the continent that even if it would join Simon Bolivar in the independence war, it would be one of the first states to splinter off. Even without the language the culture is just too different. I see the US and Canada merging before I can imagine Brazil - even a Spanish speaking Brazil- merge with any other country.
 
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