How do you say iron bru in french?

There is no direct translation for "Iron Brew" into French. You would have to describe it, for example:

* "Boisson gazeuse au goût de caramel et d'orange" (Carbonated drink with a caramel and orange flavor)

* "Soda au caramel et à l'orange" (Caramel and orange soda)

* "Boisson énergisante au goût de caramel et d'orange" (Energy drink with a caramel and orange flavor)

You could also just say "Iron Brew" in English, as it's a well-known brand name.