This paper addresses the question of linguistic complexity in Swahili, a Bantu language spoken in East and Central Africa. Literature on linguistic complexity in other languages has argued that high levels of second-language learning affect linguistic complexity over time. Swahili serves as an ideal case study for this question because it has been used as a lingua franca for several centuries. I compare the phonological and morphological systems in Swahili to five other related Bantu languages,

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... as well as compare all six languages to the original Proto-Bantu systems. The results of the study show that there is no decrease in phonological or morphological complexity in (standard) Swahili when compared to other closely related Bantu languages, though the grammar has strongly diverged from the other related languages.\\