The Mercosur group, which includes Paraguay and Uruguay, was founded in 1991 to eliminate trade barriers among its members, but also aims to achieve political integration.
Personally, I'd like the World Cup to go to a team who haven't won it before, and that doesn't include Uruguay.
Brazil was instrumental in creating Mercosur, a regional trade pact that also includes Argentina, Paraguay and Uruguay.
Exceptions to this include Uruguay (Native Charrúa).
Mercosur also includes Brazil, Paraguay and Uruguay.
The tour includes Argentina, Uruguay, Chile and Perú.
Financial centres that have committed to - but not yet fully implemented - the standard (includes Guatemala, Costa Rica and Uruguay).
Since then they have included Paraguay, Uruguay and Chile as observers, with plans for including these countries as full members.
Evangelical Church of the River Plate (includes Paraguay and Uruguay)
Its distribution is uncertain but probably includes Brazil, Paraguay, Uruguay and Argentina.