QUICK ANSWER
"Cousin" is a noun which is often translated as "el primo", and "happy birthday" is a phrase which is often translated as "feliz cumpleaños". Learn more about the difference between "cousin" and "happy birthday" below.
cousin(
kuh
-
zihn
)A noun is a word referring to a person, animal, place, thing, feeling, or idea (e.g., man, dog, house).
1. (relative)
a. el primo (M), la prima (F)
(m) means that a noun is masculine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
I'm going to spend the summer with my cousin in Canada.Voy a pasar el verano con mi primo en Canadá.
happy birthday(
hah
-
pi
buhrth
-
dey
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. feliz cumpleaños
So, you're 18 today! Happy birthday!¡Así que cumples los 18 hoy! ¡Feliz cumpleaños!