When Greeting a local, just say Jambo! It’s the commonest greeting in Kenya and is comparable to indicating "good day" in English. Don’t choose pictures of folks without asking them initially; it’s disrespectful and impolite. Say, “Naomba kukupiga picha”, which means: “Can I you should choose a photo of you? https://www.zepisaafricansafaris.com/tanzania-tours-safaris/