Greasy Fork is available in English.
Allows you to download subtitles from Amazon Video
< Feedback on Amazon Video - subtitle downloader
No, this script is for downloading subtitles you can see. If you can't see other languages - this script won't make them appear.
How does this work? I live in the USA and I have Prime Video, and it sucks that my entire family can't watch it cuz is all English. NO Spanish subt. Is this script for that issues? Can I get Spa subt for the series?