Brazil, officially the Federative Republic of Brazil, is the largest and the only Portuguese-speaking country in South America. It is the world's fifth largest country both by geographical area and population.
When the Simpsons go to Barnacle Bay, which was Marge's old childhood paradise is now a disgusting dump. To which Lisa says that this is worse place that the family has ever gone too. Bart then replies what about Brazil, to which Lisa replies after Brazil.
Ronaldo, a Brazilian soccer player, once comes to Springfield to point out that Lisa is flopping all the day while playing soccer what made Homer as a referee to give her a yellow card and then a red card. Ronaldo also teaches the Simpson family how to play soccer. 
The Simpsons come to Brazil for Homer to coach Soccer.