If this book is to be translated and published, it must be approved by the author himself or the copyright owner. You can contact the publishing house to ask the copyright owner, or you can contact the domestic copyright agency. But if you personally contact the copyright agency, it will be very difficult, because you are an amateur, and it is not easy for you to publish this book, because it is very troublesome and expensive. You can contact the domestic publishing house first. If they agree to publish the book, they will contact the copyright agency to buy the copyright, and you will only appear as a translator. I hope it will help you and be adopted. It means a lot to me that you can lift a finger.