In this talk, we’ll explore Duolingo's efforts to build a virtual language tutor, using the latest AI technology. In 2023, Duolingo launched a new feature built on GPT-4 called Roleplay, to simulate the experience of realistic conversation practice in a foreign language. As an engineer behind the product, I'll discuss iOS-specific challenges, as well as common issues working with generative AI issues, such as latency optimization. The talk concludes with an interactive demo of the Roleplay feature, providing an inside look at how AI is transforming language learning. Speaker: Xingyu Wang try! Swift Tokyo Conference 2024 - try! Swift Tokyo is back! Developers from all over the world gather for tips and tricks and the latest case studies of development using Swift. Developers from all over the world will gather here. Swift and to showcase our Swift knowledge and skills, and to collaborate with each other, The event will be held for three days from March 22 - 24, 2024! Channel: https://www.youtube.com/@trySwiftConference X: https://twitter.com/tryswiftconf WebSite: https://tryswift.jp