Thank you very much for your valuable feedback. To be honest, I did not expect that there would be international learners in the course, let alone that one would take the time to leave such thoughtful feedback. I sincerely appreciate you sharing your perspective. As you mentioned, the code comments and PDF materials are currently provided in Korean, and I fully understand that this may cause inconvenience for international learners. Taking your feedback into account, I plan to gradually review and expand English versions of the core code comments and supporting materials in future updates. I will continue to improve the course so that it can be helpful not only for learners in Korea, but also for those from abroad. Thank you again for your valuable feedback.