Plex honors the forced flag in embedded subtitles. It also supports using …language.forced.ext for external subtitles. Note that Plex remembers your last subtitle choice. So, if you turn off subtitles for a particular movie, Plex will remember that choice and leave them off the next time you play that movie.
Can you supply additional information?
What version of PMS and on what platform?
Embedded or external subtitles & type - SRT, PGS, etc?
Please provide a directory listing, screen snapshot, etc with the folder & naming structure.
