Greasy Fork is available in English.
Allows you to download subtitles from Netflix
< Netflix - subtitle downloaderについてのフィードバック
You could try this script.
https://github.com/Satsuoni/widevine-l3-guesser/issues/1#issuecomment-911933557
Try this script for downloading the audio from Netflix.
https://github.com/Essam3152/Netflix-videos-downloader
Works great. Would be nice if it allowed downloading audio too.