21 Basic Portuguese Phrases You will Use! Oi/Olá- Hi or Hello. Saying hi to someone is the best way to start chatting! ... Bom Dia- Good Morning. ... Boa Tarde- Good Afternoon. ... Boa Noite- Good Night. ... Prazer- Nice to meet you. ... Por favor- Please. ... De nada- You're welcome. ... Obrigada/o- Thank you. More items...