In English, both countries and nationalities are spelled with a capital letter. But in Italian, you’d say Cina and cinese. You don't have to capitalize nationalities.
Il pane francese è molto popolare in Brasile.
French bread is very popular in Brazil.
Vado in Spagna la settimana prossima.
I go to Spain next week.
I miei genitori sono spagnoli.
My parents are Spanish.
Languages, just like nationalities, are not capitalized either in Italian.
Vengo dall'Italia e parlo italiano.
I come from Italy and I speak Italian.
In Brasile si parla portoghese.
In Brazil, Portuguese is spoken.
Remember that in Italian you’ll usually add in between a verb and a country.
You’ll also use in before continents.
Sei mai andato in Africa?
Have you ever gone to Africa?
In Asia lo mangiano.
In Asia they eat it.
One of the first questions you might hear in Italy is Da dove vieni?. To say I am from… in Italian, you’ll use the verb venire with the combination of da plus il, la, l’, etc. followed by your country.