Wanna Practice Your Language

I came across a problem today. I am a Latin learner and I had no one to practice my new skills with. How are people learning dead languages able to keep up with lets say soemone learning Spanish. I want to create an app that connect you with an AI bot programmed to talk and text in your choice language. To do this I need to know what would be the best language to offer on this app. I hope you can help me get my idea up and started