A female person is Spanish is: persona. This would be exactly the same for a male. The word person is feminine and can refer to either a female or male.
"Sweetheart" in Spanish is "querido" if the person is male, "querida" if the person is female. It is pronounced "kay-REE-doe" or "kay-REE-dah". Please see the Related link below for confirmation of the translation.
dominicano (male) or dominicana (female)
Hidalgo - traditional Spanish nobility title for male person.
Sexless
milanesado/a = person from Milan, Milanese (male/female)
As in being both male and female? A hermaphrodite, I believe.
An average pubescent male.
If you mean 'alemania' - un aleman (male) or una alemana (female)
A latvian person - latvietis(male) and latviete(female)
A library is a biblioteca. The person who works there is a bibliotecario (male) or a bibliotecaria (female).
Both, depending on whether the person in question is male or female.