How do you say its a goal in french?

There are a few ways to say "It's a goal" in French, depending on the context:

Formal:

* C'est un but. (This is the most literal and formal translation.)

Informal:

* C'est un but! (Adding an exclamation mark makes it more expressive and informal.)

* But! (This is a very informal and common way to say "goal" in sports contexts.)

* C'est marqué! (This literally means "It's scored!" and is used in sports to announce a goal.)

Other variations:

* Il a marqué! (He scored!)

* Elle a marqué! (She scored!)

The best choice will depend on the situation and your level of formality.