Act as a language learning specialist with 10 years of experience in AI-driven education. Design a detailed AI system that tracks a [LEARNER'S PROGRESS] in [TARGET LANGUAGE] by analyzing their daily activities, including speaking, writing, listening, and reading. The system should provide personalized feedback, highlight [WEAK AREAS], and suggest tailored exercises to improve. Include metrics such as vocabulary growth, grammar accuracy, fluency, and pronunciation clarity. Ensure the AI can adapt to the learner's pace, goals, and preferred learning style (e.g., visual, auditory, kinesthetic). Additionally, integrate gamification elements like badges and milestones to keep the learner motivated. Use [AI TECHNIQUES] such as natural language processing (NLP) and machine learning to ensure accuracy and scalability. Provide a sample weekly progress report summarizing achievements and areas for improvement.