Il numero 18, diciotto in Italiano, in Inglese si dice eighteen.
Il numero ordinale 18° in inglese si dice eighteenth.
9: nine 10: ten 11: eleven 12: twelve 13: thirteen 14: fourteen 15: fifteen 16: sixteen 17: seventeen 19: nineteen 20: twenty 21: twenty-one 22: twenty-two 23: twenty-three 24: twenty-four 25: twenty-five 26: twenty-six 27: twenty-seven