Sounds good!
Mostly everybody knows what a spawn camper is, but translating the consequences of acting in such a way to as many languages as possible seems like a neat idea to me, I believe.. it would show a more classy but yet open and fun server.
These are two options I believe would do the trick for Spanish speaking people (Latin-Americans and Spaniards as well).
1) Friendly approach:
“Bienvenidos al Servidor de KKK… “Spawn Campers” serán expulsados sin advertencia previa y los recurrentes se verán imposibilitados a regresar.
2) A Little bit more lenient:
“Spawn-Camping” No es permitido en este Servidor, Si lo haces te atienes a las consecuencias.
Just my 2 Cents!
Sebaot