You can download these files from reputable community subtitle databases: OpenSubtitles.org Advanced Search feature and check the box for "Foreign parts only" to filter out full-movie subtitles.
Forced Subtitles is a Necessity – An Overview - CaptioningStar You can download these files from reputable community
Skip to 01:27:00 (The basement tavern). The British officer tries to order three glasses of whiskey in bad Italian. a clean file
Subscene is arguably the most popular hub for movie subtitles. You can download these files from reputable community
Yes, GitHub hosts subtitle repositories. Search for: subtitle forced inglourious basterds .
You need a trusted source, a clean file, and the correct frame rate.
If you are using Plex , you can set this track to "Forced" in the file metadata so it turns on automatically.