African and Middle Eastern Languages, su swahililanguage.stanford.edu. URL consultato il 19 luglio 2016.
«After Arabic, Swahili is the most widely used African language but the number of its speakers is another area in which there is little agreement. The most commonly mentioned numbers are 50, 80, and 100 million people. [...] The number of its native speakers has been placed at just under 2 million.»