Now I have the Lion King stuck on my mind!
Swahili (or Kiswahili): Here there are no concerns; No worries; Don't Worry; Chill (loosely). Hakuna Matata term is mostly used in Kenya
In more detail:
Kuna: there is (Swahili)
Hakuna: there is not (Swahili)
Matata: Problem (Plural)(Swahili)
Literally means 'There are no problems'