My wife built an app that teaches people (foreigners) how to speak english. Based on the words in their flashcards, we generate dynamic sentences so during prac

My wife built an app that teaches people (foreigners) how to speak english. Based on the words in their flashcards, we generate dynamic sentences so during practice their flashcards are rarely the same. For example, if I have (happy, sad, run, write) in my backpack, then a sample flashcard would show up as: "When I run, I will be sad". I see lyrebird api being very helpful in helping my users practice listening skills and add a level of creative fun! If we had 10-20 different voices, the flashcards will be read a little differently each time. Right now (since our flashcards is dynamic), our audio feels very monotone. We would love to help you beta test your API and work something out.