This is the 4620th most frequent Catalan word.
portuguès
Portuguese.
In this sentence, 'portuguès' is used as a noun referring to the Portuguese language.
Ell parla portuguès molt bé.
He speaks Portuguese very well.
Here, 'portuguès' is used as an adjective describing the nationality of the man.
Vaig conèixer un home portuguès ahir.
I met a Portuguese man yesterday.
'Portuguès' is used again in this sentence as a noun, referring to the language being studied.