PERU CIV -
Peru CIV doesn't have a settle map yet but looking at the settle map of spainCIV we have that the canonical cities will be Lima, Cusco, La Paz.
Chiclayo/Trujillo(4N1W/3N1W from Lima), Iquitos (5N2E from Lima), Arequipa (2S from Cusco) and Iquique (3S1W from Lima) should be priority cities of 5/8/10 in PeruCIV, to ensure that are cities to be founded.
La Paz' Potatoes resource is covered with rainforest and cannot be improved with farm until the tech microbiology, I think you should switch to savanna feature to be able to fix that.
ARGENTINA CIV -
As you can see the cities that are marked with priority 20 on the SpainCIV settler map are, Buenos Aires, Montevideo, Santiago de Chile. these will be the canonical cities. As there won't be a ChileCIV these tiles/cities should be on the ArgentinaCIV settle/war map.
Note that in the case of Assunción (capital of Paraguay) its tile is marked with priority 10 on the spain map, I think it should be changed to 20, as the city of Asuncion was one of the first to be founded, in the basin region watershed of the Rio de la Plata, and during the colonization process it was the starting point for numerous processes of city expansion throughout the region, which is why it is called "La madre de las ciudades" (the mother of cities). So I believe it should be canonical in all plays, because now the map is big enough.
Another point is that the tile of the city of Córdoba in the Settle map of Spain is incorrect, it should be 1N to match the settle map of Argentina, and be in a geographically correct position.
The other cities with 10/8 priority for Spain/Argentina settle map, are Córdoba, Salta/Tucumán, Viedma, Neuquén, Rio Gallegos, Malvinas. I think Concepcion (3S1W from Santiago) should be add on argentina's settle map with priority 10. The Corrientes tile is next to Assuncion, as the area there already has the cities of Buenos Aires, Montevideo, Assuncion and Porto Alegre, I think Assuncion should be prioritized, or else move the corrientes tile 1S but if it settles there it goes get very cramped. The tile of malvinas should have settle priority of 20 for argentinaCIV because if not rarely it will be founded.
Viedma's tile has a cow resource on it, the resource should move 1NW.
Montevideo, because it is very close to Buenos Aires, has little food resource (it only has 1 sheep) maybe you could put the resource 1 Deer there, because the pampas deer, and other types of deer are common in the region and were introduced for hunting. Or add a fish/cow resource.
I suggest that the resource fish and whale near concepcion be switched, so that the city can work the fish that produce much more food than the whales
BRAZIL CIV -
As you can see the cities that are marked with priority 20 on the Portugal CIV settler map are, Porto Alegre, São Paulo, Rio de Janeiro, Recife, Fortaleza, Belém. these will be the canonical cities that appear in all plays.
The other cities with 10 priority for Portugal/brazil settle map, are Salvador, Ouro Preto/Belo Horizonte, São Luís, Curitiba.
The city of Salvador has a 10 settler priority, but historically it is one of the most important cities in Brazil, especially during the colonial period, being the capital of colonial Brazil from 1549 to 1763, so I believe that the city should have a priority of 20 for PortugalCIV .
The city of Ouro Preto/Belo Horizonte is just 1 tile away from Rio, and 2 tiles away from São Paulo, and yet 2S1E from Brasilia which will be an important city for BrazilCIV in the future as it is its capital, in a region it is very hilled, so I think that even though it has historical relevance I think that for the reality of the game, it should not be settled because it would make the region very cramped, and there would not be enough tiles to be worked by Rio and são paulo cities that are the biggest in Brazil.
The city of São Paulo was only 1 tile away from Rio, I think it would be better for the gameplay if the São Paulo city tile was moved 1W, so that there is not such a huge overlap of tiles between Rio and São Paulo and so on allow both cities to have large populations.
Note that the tiles with the resources spices in Belém, citrus in Porto Alegre, and Tea 4W of São Paulo are covered with jungle and therefore cannot be worked on until you discover the microbiology tech, is this intentional or should it be changed to rainforest when the BrazilCIV spawn? Belém' Potatoes resource is covered with rainforest and cannot be improved with farm until the tech microbiology, I think you should move 1S the resource and thus put it on a tile with Savanna and preserve the tile with the rainforest feature.
I think you should move the resources 1 Cow and 1 Coffe from Ouro Preto/Belo Horizonte tile 1E so that they are in tiles that would be equivalent to areas of the state of minas Gerais as this would be more suitable geographically, and culturally the state of Minas Gerais is known for producing milk and coffee, so it would be more culturally appropriate. I also suggest that the tile that will be with the cow resource becomes grassland, because the "Zona da mata mineira" is a wet zone in the state of Minas Gerais.
The following Sao Paulo resources should move. Sugar moves 1NW, corn moves 1 NE, Banana moves 1 E. to be in a more suitable position. So, if OuroPreto/BeloHorizonte are founded, these resources can be shared, and the interior region of the state of São Paulo is traditional in fruit production. so I think the resources are culturally allocated in a better way.
Belém has many tiles occupied with jungle I think there should be a 1Crab resource spawn there, as the collection of crabs in the mangroves at the mouth of the Amazon river is a source of cultural food for the area of Belém and the state of Pará.
I think that Rio's fish resource should move 1S, because Rio's cuisine, due to Portuguese influence, has the consumption of dishes related to oceanic fish such as cod, sardines, "Corvina" among others, so the fish resource would be improved with the ocean fishery and would release 1 more coast tile to be worked on.
I add the save with the map if you want to take a look, Leoreth I don't know which version I'm using, but it was downloaded the day you sent me the authorization to access the private branch of the map, on Github.
I hope these messages are useful for moving some resources around. think about adding others. fix some bugs in the settle map and more ....