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"Países" is a form of "país", a noun which is often translated as "country". "Nacionalidades" is a form of "nacionalidad", a noun which is often translated as "nationality". Learn more about the difference between "países" and "nacionalidades" below.
el país(
pah
-
ees
)A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
1. (geography)
a. country
Se está invirtiendo mucho dinero en países en vías de desarrollo.A lot of money is being invested in developing countries.
China es el país más poblado del mundo.China is the world's most populous country.
2. (literary)
la nacionalidad(
nah
-
syoh
-
nah
-
lee
-
dahd
)A feminine noun is almost always used with feminine articles and adjectives (e.g., la mujer bonita, la luna llena).
a. nationality
Tiene nacionalidad italiana porque nació en Milán.He has Italian nationality because he was born in Milan.
b. citizenship
Mi amigo tiene doble nacionalidad de Alemania y Argentina.My friend has dual citizenship in Germany and Argentina.
a. people
Hay varias nacionalidades distintas dentro del estado español.There are several distinct peoples within the Spanish state.