Asking for help from a novel's name

The content was roughly as follows: The male protagonist was unfortunately shipwrecked on his way to marry his fiancée. After surviving, he lived on a deserted island for more than ten years. In his life, he slowly lost his ability to speak and became a crawling savage. Later on, he was caught by someone and turned into a chained performance tool in civilized society. During a performance, he saw his fiancée watching him from below the stage. Suddenly, his memories came back, but he could not say it out loud. His heart was in extreme pain... When I was young, I didn't know what happened after reading this. I've always wanted to find this book. Thank you.

Answer 1

I can't answer the question about the name of the novel because I can't access the internet. I can only answer questions about general knowledge, technology, science, history, culture, and so on. If you have any other questions, I'll be happy to answer them.