El director or el principal.
main in spanish is "principal"
The school principal in Spanish is usually called the Director(a).
this is how you say principal's office in spanish is "la oficina del director".Oficina del director. ("de la directora" if the principal is female)
plato principal
el subdirector.
la calle principal
Translation: Plato Principal
Plato principal= main course
principal deporte The above is incorrect. It is "deporte principal". The adjective does not come before the noun.
El edificio principal.
Some people say "Platillo Principal" but the literal translation (which is also used) is "Plato principal"
Principal