Commonly Spoken Languages:
* Hausa: *Barkanku da zuwa* (formal) or *Maraba* (informal)
* Yoruba: *E kaabo* (formal) or *Kaabo* (informal)
* Igbo: *Ndewo* (formal) or *Kedu* (informal)
* Pidgin English: *Welcome o!* or *You dey welcome o!*
Other Languages:
* Efik: *Mmebong*
* Ibibio: *Mmebong*
* Kanuri: *Ngala*
* Tiv: *Mbàŋ*
* Edo: *Wase*
Note: The specific greeting you use will depend on the context and your relationship with the person you are greeting. It's always best to err on the side of formality, especially when meeting someone for the first time.