How do you say What is happening in french?

There are a few ways to say "What is happening" in French, depending on the context and desired level of formality:

Formal:

* Que se passe-t-il? (This is the most common and formal way to ask)

Informal:

* Qu'est-ce qui se passe? (This is a more casual way to ask)

* C'est quoi? (This is very informal and translates roughly to "What's up?")

* Quoi de neuf? (This means "What's new?" and is another casual way to ask)

Other options:

* Que se fait-il? (This is another formal option, although less common)

* Quel est le problème? (This means "What's the problem?" and is a good choice if something seems wrong)

The best choice will depend on the situation and who you are talking to.