Mon dix-huit anniversaire.
joyeux dix-huitième anniversaire
Mon anniversaire est le dix-huit septembre.
a birthday is 'un anniversaire' in French
Wish them a happy birthday and all the best for their future.
Birthday is "anniversaire" (masc.) in French.
Mi primo cumpleanos dieciocho anos
d'anniversaire
A birthday cake in French is 'un gâteau d'anniversaire'
le dix-huit novembre
you say mon gorna be mansa
un anniversaire
"Today is my birthday!" in French is "Aujourd'hui est mon anniversaire !"