Kenya has been pushing adoption of Kiswahili as a lingua franca for Africa. Due to Kenya's influence and visibility internationally, Kiswahili is slowly gaining ground. Kenyans pushed twitter to have Kiswahili as one of the language, it succeeded, Kenya petitioned AU to have it as one of the language, it succeeded, Other example where Kenya has worked hard to have Kiswahili adopted is Google, Facebook, Microsft, etc . Kenya is the real force behind visibility of Kiswahili. Tanzania has nothing to do with all these. Inatazama tu!