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Casa - House/home
Fiesta - party
However "Casa Fiesta" is not grammatically correct to mean "House party". It would mean something like "House of party"
House of the sun.
"Mi casa es tu casa."
Mi casa es ésta.
Ésta es mi casa.
Mi casa ésta es.
He aquí mi casa.
Nuestro casa esta su casa
this is the correct translation: Our house is your house translated into Spanish
Nuestra casa es su casa