portugiesisch
Portuguese
Relating to Portugal, its inhabitants, its culture, or the Portuguese language.
Wir haben in einem kleinen portugiesischen Restaurant zu Abend gegessen.
We had dinner in a small Portuguese restaurant.

Portuguese
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Portuguese
Relating to Portugal, its inhabitants, its culture, or the Portuguese language.
Wir haben in einem kleinen portugiesischen Restaurant zu Abend gegessen.
We had dinner in a small Portuguese restaurant.

The adjective is derived from the country name 'Portugal'. The ending '-isch' (-ese / -ish) is a very common way to form adjectives from country names or regions.
Die portugiesische Flagge ist rot und grün.
The Portuguese flag is red and green.
As an adjective before a noun, 'portugiesisch' (Portuguese) is written in lowercase. When it refers to the language as an independent noun, it is capitalized: 'Portugiesisch' (Portuguese).
Der portugiesische Wein ist weltberühmt.
Portuguese wine is world-famous.
The adjective is typically combined with nouns that refer to the country. Common examples are 'die portugiesische Küste' (the Portuguese coast), 'portugiesisches Essen' (Portuguese food), or 'die portugiesische Nationalmannschaft' (the Portuguese national team).
Im Urlaub haben wir viele portugiesische Spezialitäten probiert.
On vacation, we tried many Portuguese specialties.
Brazilian
'brasilianisch' and 'portugiesisch' can easily be confused because Portuguese is spoken in Brazil. 'brasilianisch' refers to Brazil, its people, its culture, or something from Brazil. 'portugiesisch' refers to Portugal or to the Portuguese language. If you are talking about a country, food, music, or a person from Brazil, 'brasilianisch' fits. If you are talking about Portugal or the language, 'portugiesisch' fits.

Vor dem Termin lernt Sofia ein paar portugiesische Sätze.
Before the appointment, Sofia learns a few Portuguese phrases.
Im Sommer besuchen wir ein brasilianisches Restaurant in der Stadt.
In the summer, we are visiting a Brazilian restaurant in the city.