Eats, Shoots and Leaves - S1-E11
Factual error: They travel to Zambia along the Luangwa to search for leopards and the locals speak Swahili. In that region of Zambia they speak Nyanja or Bemba. I lived in Northerm Zambia for a few years and all the way up to the Tanzania border it was not common for anyone to know Swahili.