The biggest languages present in Brazil include:

Portuguese  208.31 million speakers.
Spanish  6.38 million speakers.
English  8.50 million speakers.
German  2.13 million speakers.
As such, many Brazilians are able to understand Spanish, though they may not speak it fluently. As with speakers of all minority languages in Brazil, Spanish speakers pop up in clusters. Many of these occur close to Brazil's borders with other Latin American countries, where Spanish is the primary language.