How do you say hello little brother in french?

There are a few ways to say "hello little brother" in French, depending on the context and your relationship with your brother:

Formal:

* Bonjour, mon petit frère. (This is the most formal and respectful way to address your brother.)

Informal:

* Salut, petit frère. (This is a more casual and friendly greeting.)

* Coucou, petit frère. (This is a very informal and playful greeting.)

Affectionate:

* Bonjour mon petit chou. (This is a very affectionate way to greet your brother, meaning "hello my little cabbage.")

* Salut, mon petit loup. (This is a very affectionate way to greet your brother, meaning "hello, my little wolf.")

Note: You can also use "frère" (brother) instead of "petit frère" (little brother) if you prefer. However, "petit frère" is often used to express affection and closeness.

Ultimately, the best way to say "hello little brother" in French is the one that feels most natural and comfortable to you.