If you simply popped the disc in and hit play with your player’s default “Subtitles: Off” setting, the movie would play perfectly in English during the action scenes, but go completely silent (visually) during the Russian prison scene. You would watch Jeremy Renner’s character, Brandt, converse with a guard, nod, and move on—with absolutely zero translation on screen.
According to an interview with Paramount Pictures' president of international distribution, Jim Gianopulos, the decision to include forced subtitles was made to cater to the growing number of international viewers who prefer to watch movies with subtitles rather than dubbed audio. Mission Impossible Ghost Protocol Forced Subtitles
You must manually select the "Foreign Audio Only" or "English Forced" track within your player. If you simply popped the disc in and
Another approach is to use advanced audio and captioning technologies, such as object-based audio and audio description, to create a more immersive and accessible viewing experience. You must manually select the "Foreign Audio Only"
The 4K disc includes a proper forced subtitle track for the foreign dialogue. However—and this is a big however—the implementation depends on your playback device.
If you are ripping the disc for a home media server like Plex or Jellyfin, look for these markers: