I need a mobile app designed to teach languages, primarily aimed at adults. The app should include: - Comprehensive lesson plans and tutorials - Engaging language games and quizzes, such as: - Vocabulary matching - Grammar exercises - Listening comprehension Ideal Skills and Experience: - Expertise in mobile app development - Experience in creating educational content, specifically for language learning - Familiarity with gamification in educational apps - UI/UX design skills to ensure a user-friendly experience for adults Please provide examples of similar work done.