How do you say, "I am portuguese" and "I speak Portuguese" and also japanese for Portugal, thank you.

Question

Answer

I would say it like this

I am Portuguese:
私はポルトガル人です (Watashi wa porutogarujin desu)

I can speak Portuguese:
ポルトガル語を話すことができます (Porutogarugo wo hanasukoto ga dekimasu)

Portugal:
ポルトガル (Porutogaru)

Answer

Watashi wa porutogaro jin desu. (I am Portuguese)
Porutogaru go o hanashimasu. (I speak Portuguese)  Porutogaru go o hanasu ga dekimasu. (I can speak Portuguese).
Porotugaro (Portugal)