mpv script which observes subtitle changes for specified words (as defined in the words array) and mutes mpv and hides subtitles (for the duration of that specific subtitle). Unmutes and restores subtitle visibility settings when the subtitle that contains specified word(s) ends.
Uses word boundary regex matching to minimise false positives (e.g if the word real has been added, then this script will match on real but not surreal).
Add the script to your mpv script folder (usually at ~/.config/mpv/scripts for GNU/Linux and C:/Users/Username/AppData/Roaming/mpv/scripts/ for Windows).