"How is the morning brother?"
Translation:habari za asubuhi kaka?
February 23, 2017
I think it has to do with what the next word is (perhaps words starting with a vowel?)
May 1, 2017
Apparently 'ya' and 'za' are interchangeable in greetings. See this post, https://www.duolingo.com/comment/22402710/Ya-versus-Za
November 5, 2017