 But the number of immigrants from Swahili-speaking countries has also grown over the years. That's something Christopher Matthews has seen firsthand. He's a recent graduate of the University of Pittsburgh. As a student, he used to volunteer with Swahili-speaking refugees. The reactions that you get from people when you're able to communicate with them in their language are so, so incredible. And that's anything from a few greetings to being able to have a fluent conversation.