Formal:
* Sabah el khair: (Good morning)
* Masaa el khair: (Good evening)
Informal:
* Salam: (Peace)
* Bonjour: (French influence)
* Salut: (French influence)
* Ahla w sahla: (Welcome)
More casual:
* Kifek? / Kifek enti?: (How are you?)
* Shouf: (Look, or Hey there)
You can also use expressions like:
* Nchallah: (God willing)
* Behi: (Good)
* Maalech: (It's alright)
It's important to note that Tunisian Arabic is very regional and often incorporates French words and expressions. The best way to learn the most appropriate greeting for a particular situation is to observe how native speakers interact with each other.