There is a way you can disable all subtitles. If you want this to be as flawless as possible you will need to make some changes. Will this work for the classic Plex version for Roku… Probably not…
1st) Server settings.
2nd) The subtitle(s) tracks for the movie must be set correctly.
You should see something like this.
As you can see, SRT track 1 is on and set as the default and will be shown in the movie.
Remember though, the last part of your question relies on you. If you don’t have a subtitle file that only contains the non-English parts of the movie then it won’t work the way you want it to. This of course is for local files you have, not some online source…
I do not use any online sources to automatically pull down subtitles so I do NOT know if subtitles will display for non-English parts…
