Abstract: The application of Generative Artificial Intelligence (GenAI) in foreign language learning has significantly transformed learner's language learning methods through personalized instruction, real-time interaction and feedback, and cultural context immersion. However, the widespread adoption of generative AI has also sparked discussions concerning its impact on learner agency. This paper examines the use of generative AI in foreign language education and analyzes its potential effects on learner agency. It finds that unplanned and unstrategic use of AI could weaken learners'agency, potentially causing dependency and thereby reducing learning capabilities and outcomes. Therefore, this paper proposes strategies such as using AI as an auxiliary tool, combining it with traditional learning methods, and implementing self-assessment practices to help learners maintain their agency and creativity.

Key words: Generative Artificial Intelligence, Foreign language learning, Learner agency, Personalized learning, Metacognition, Learning strategies