Language of Brazil

OLA! Boa tarde! 

The above phrase means, "Hello! Good afternoon!"

The majority of Brazilians are monolingual in Portuguese, however, the middle-class and elite Brazilians study English and to a lesser extent Spanish, French, and German. Brazilians are very proud of their linguistic heritage and resent that many foreigners, particularly North Americans, think Brazilians speak Spanish. 

Portuguese, a Romance language, belonging to the Indo-European language family. The Portuguese language was introduced to Brazil by the Portugal Portuguese in the early sixteenth century. 

Brazilian Portuguese differs somewhat in grammar, vocabulary, and pronunciation from the language of Portugal. 

Brazilian Portuguese contains a large number of indigenous terms, particularly Tupi-Guarani words for native plants, animals, and place-names that are not found in continental Portuguese. While regional accents exist in Brazil, they are not very pronounced and native Portuguese speakers from one region have no difficulty understanding those from other regions. 

Here's a video on how to speak Brazilian portuguese.

Basic Portuguese Phrases

 Bom dia. - Good morning.

 Boa tarde. - Good afternoon.

 Boa noite. - Good night.

 Fala inglês? - Do you speak English?

 Há alguém aqui que fala inglês? - Does anyone here speak English?

 Onde posso encontrar alguém que fale inglês? - Where can I find someone who speaks English?

 Desculpe-me por falar tão mal o português. - Excuse my poor Portuguese.

 Só falo um pouco de português. - I only speak a little Portuguese.

Portuguese Phrases for Meeting and Greeting

 É um prazer conhecê-lo. - I am pleased to meet you.

 Falaram-me muito de voc? - I have heard so much about you.

 Foi um prazer conhecê-lo.-  It was nice meeting you.

 Não entendo. - I don't understand.

 Compreendo perfeitamente. - I understand perfectly.

 Compreende? - Do you understand?

 Compreendo-o se falar devagar. - I understand if you speak slowly.

 É muito melhor. - That is much better.

Que disse? - What did you say?

Que tenha um bom dia! -  Have a nice day!

Obrigado! Which means, Thank you! 

Reference:

http://www.transparent.com/learn-portuguese-brazilian/phrases.html