Mi piacerebbe sposarmi con una persona italiana
une jour, je veux (i think--but you should recheck the conjugation of veux)
i want you
BUON NATALE!!
feliz navidade
Me quiero casar contigo = (I want) to marry you
what you will do is get down on your knees and say to her "will you marry me?" and that is how you will ask someone to get married to you
well there's no rule where you can say" you can't just marry who you want to marry" you can marry whoever you want so yeah
If you want to say happy retirement in Italian you would say, pensione felice. You would say good luck by saying buona fortuna.
Vuoi essere là
Voglio solo
there isn't really an "it" in italian, so if you want to say "it's italian, you would just say italiano (itah lee ah no) hope it helps :)
Maybe ask her to marry you and say you want a family. that is if you want