Short answer:
Felicidades por tus quince años (use the "tuteo", because the person is young)
Long answer:
In Mexico is very common for girls to celebrete their fifteenth birthday, they are called "quinceañeras" it's like sixteen in US.
happy = felices
literal tranlsation of Fifthteenth is "quinceavo" or "décimo quinto" but in this case you are talking about a birthday so the translation is "quince años":
Literally is
Quince = fifteen, años = years
But take into account that translation should be as natural as possible. Translation is not saying word by word from one language to another one.
Cinco.
Beans may be habichuelas or frijoles.
(El) cuatro de mayo
Cuatro de Mayo
(El) cuatro de mayo
how do you spell lemon in spanish
"con" I think "con" is how you spell with in spanish.
flaco is how you spell skinny is spanish.
parece that is how you spell seems in spanish
Heck with Spanish - can you spell it in English?
Abby can be used, but Abigail may also work
"Thursday" in Spanish is "jueves". It is not capitalized.