About the Brazilian Portuguese Language
 
Portuguese is the mother tongue of about 170 million people, mainly in Portugal and the Portuguese islands in the Atlantic (11 million speakers); in Brazil (154 million speakers); and in Portugal's former overseas provinces in Africa and Asia (about 5 million). Although the Portuguese spoken in Portugal differs from the Portuguese spoken in Brazil, in vocabulary, grammar, and pronunciation, they are mutually intelligible.

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Brazilian Portuguese-Speaking Countries

Brazil Port
The differences are equivalent to the differences between English spoken in the USA and in England.

The Pimsleur Brazilian Portuguese course uses the São Paulo dialect.