Formal:
* Ukhona njani? (pronounced: oo-khona nyah-ni) - This is the most formal way to ask how someone is.
* Unjani na? (pronounced: oon-ya-ni nah) - This is a slightly less formal version of the previous phrase.
Informal:
* Unjani? (pronounced: oon-ya-ni) - This is the most common and informal way to ask how someone is.
* Kulungile na? (pronounced: koo-lun-gi-lay nah) - This means "Are you well?" and is a more casual way to ask how someone is.
Note:
* The addition of "na" at the end of the phrase makes it slightly more polite.
* You can use the phrase "Ndingu..." (pronounced: nin-goo...) before any of these phrases to add "I am..." to the greeting. For example, "Ndingu, Unjani na?" would translate to "I am, how are you?"
It's always a good idea to observe the context and formality of the situation when deciding which phrase to use.