 As Disney's The Lion King once said, Hakuna Matata means no worries in Swahili or Kiswahili, as it's called locally. This is a language that's grown to become one of the ten most widely spoken languages in the world. As the world's Africa correspondent, Halima Gakandi, reports from Mombasa, Kenya, July 7th has been designated World Kiswahili Day by the United Nations.