Question: I need a language learning system that offers flexibility in review intervals and allows me to learn at my own pace, can you suggest one?

If you want a language learning system that lets you set your own review intervals and learn at your own pace, Lingvist is a good option. The service offers more than 50 courses that can be customized with industry-specific vocabulary, and it uses AI to personalize learning. Lingvist's spaced repetition and short lessons (10 minutes or 50 cards a day) are designed to maximize retention and flexibility. It offers three pricing tiers and a free trial period.

Another good option is Praktika, which offers AI-powered 1-1 tutoring with generative AI Avatar Tutors. It offers a personalized experience with real-time conversations, instant feedback and progress tracking that adapts to your abilities. That means it can be a good, relatively affordable alternative to human tutors. With more than 1,000 lessons and 10,000 minutes of unlimited learning, you can learn at your own pace.

If you want a more interactive learning experience, check out SpeakAI. The service offers personalized learning paths and scenario-based courses in several languages, with real-time grammar correction and interactive dialogue modes. It's geared for practical language use, and you can try it out with a free version that includes all the core features.

Last, Mango offers a more traditional language-learning approach with a focus on helping you build basic language skills through conversation-based lessons. It's got a daily review system, personalized virtual flashcards and listening and reading exercises to help you develop practical communication skills at your own pace.