Well, I'll start a list and others can add to it:
Bom Dia! Good Morning!
Boa Noite! Good Night!
Por favor - please
Obrigado! (to a man) Thank you!
Obrigado! (to a woman) Thank you!
Onde é o banheiro? - Where is the bathroom?
Posso usar o banheiro, por favor? - Can I use the toilet please?
Quanto custa um quarto? - How much is a bedroom?
Quanto custa uma cama? - How much is a bed?
In Portugal, unlike in Spain, the bread and wine are usually NOT included.
So you can ask,
É o pão incluído? - Is the bread included?
É o vinho incluído? - Is the wine included?
Many people do speak English in Portugal. And many more do understand Spanish if you know that language.
If you ask, they will say no, but they will often understand you.
Sometimes, if you ask a person here, "Do you speak Spanish?" they will answer no, even though they've had a year or two in school.
It's the same there.
Eat lots of bacalhau!