They are Brazilian and they speak portuguese as their official language
In Brazilian Portuguese, "nan" is not a recognized term or word. It is not a word in Portuguese or commonly used in Brazilian culture.
"Yes" in Brazilian Portuguese is "sim."
The problem in Brazilian portuguese is o problema.
"John" in Brazilian Portuguese is translated to "João."
This last name is Portuguese and was popular among Portuguese and Brazilian people
"Olá" is how you say hello in Brazilian Portuguese.
"Beijos" is how you say "kisses" in Brazilian Portuguese.
There isn't an equivalent name in Brazilian Portuguese for Barry.
The word "wife" in Brazilian Portuguese is "esposa".
Harmony is harmonia in Portuguese. (Brazilians speak Portuguese not "Brazilian").
You would say "Eu sou brasileiro" in Brazilian Portuguese.