This is the 11785th most frequent Spanish word.
guatemalteca
A Guatemalan woman.
In this sentence, 'guatemalteca' is used as a noun to describe a person of Guatemalan nationality.
Ella es una guatemalteca muy talentosa.
She is a very talented Guatemalan.
Here, 'guatemalteca' is an adjective describing the type or origin of the music, namely 'Guatemalan'.
Él admira profundamente la música guatemalteca.
He deeply admires Guatemalan music.
In this instance, 'guatemaltecas' refers to women of Guatemalan origin, utilizing the word in the plural as a noun.