I need question pattern and types for my english learning and speaking app Like Duolingo and speakx app

More details: What primary audience is your app targeting? Teenagers Which language skills do you want to focus on in the app? Reading and Writing What type of questions do you envision for your app?... (Budget: ₹1500 - ₹12500 INR, Jobs: App Development, Content Development, Educational Research, Language Tutoring, Mobile App Development, Mobile Development, User Experience Research, User Interface / IA)