* Swahili is a language: It's primarily spoken in East Africa, particularly in Kenya, Tanzania, and Uganda.
* Alexander the Great was a Macedonian king: He lived from 356 to 323 BC.
Therefore, there's no historical connection between Swahili and Alexander the Great. Swahili developed much later, and their geographic locations are far apart.
It's possible the question is a wordplay puzzle, or perhaps you're remembering a story you've heard that involves these two elements.