A kitten will be considered a cat when it's nine months old. I once read that a cat was adolescent from about 10 to about 18 months of age... I guess that means s/he's an adult past 18 months of age.
Ethnically, Mexican Americans are a diverse population including Mexicans of Indigenous ancestry, Mexicans of European ancestry (mostly Spanish), and Mexicans of Middle Eastern stock (mainly Lebanese).
Spaniards' raze is white, their nationality is Spanish, and their ethnicity is Hispanic. Latino refers to latin, the language spoken by the Romans who brought it to many areas in Europe as they conquered new territory, People of Hispanic origen are those whose ancestry is in Spain.