Vale lembrar que no Brasil, o você é acentuado com ^ na letra E.

In Brazilian Portuguese "hello" is "Oi" and "bye" is "Tchau".

"How are you?" in Spanish is "¿cómo estás?" (informal) or "¿usted cómo está?" (formal).

There are many ways to say "how are you" in Arabic language, but the most used in my dialect are : كيفك(kefak), ايش اخبارك؟ (esh akhbark), كيف الحال (keef alhal)

In portuguese (from Portugal) "how are you?" means "Como estás?" ("you" in portuguese is "tu" but we can omit the personal pronouns). "Como você vai" is portuguese from brazil. They use "você" as we use "tu". For us, "você" is using to say "tu" in a more formal way. So, this is a huge difference between the portuguese from Portugal and Brazil.

Also, I am going to mention here more basic sentences, expressions and words in Portuguese to help you!

Hello - Olá

Good morning - Bom dia

Good afternoon - Boa tarde

Good night/Good evening - Boa noite (we only divided our day in 3 parts - dia, tarde, noite)

How are you? - Como estás? / Está tudo bem? (Is everything all right?)

Can I help you? - Posso ajudar-te?

What's your name? - Qual é o teu nome? / Como te chamas? (more usual)

My name is.. - O meu nome é... / Chamo-me...

How old are you? - Que idade tens? / Quantos anos tens? / Qual é a tua idade?

Bye - Adeus

If you have any questions, I'll be glad to help you!