Need Japanese subtitles

I don’t know how to show two languages as subtitles. Now I see both English. My tongue language is Japanese, and I study English. I am sure to set the Japanese translation language in settings.

I live in America, and I am not sure this issue relates to my location. I found someone who had the same problem last August, but it looks like it has not been solved yet.

Thanks for your help :slight_smile: