There could be many ways to express “How are you” in French or any other language. Below are some examples you can express “How are you” or “Hi” or “How do you do” in french.
How are you –> comment allez-vous?
Hello –> bonjour
Hi! –> salut!
How do you do? –> Comment faites-vous?
More words you can easily find and translate of your own using Google Translate