In the original HBO release, translations for fictional languages are "forced" (or hardcoded)
If you are watching the show through a media player (like VLC or Plex) or a third-party streaming service, you may need to manually locate or enable these specific tracks. game of thrones subtitles for non english parts
HBO’s creative team made a deliberate choice: In the original HBO release, translations for fictional
The Game of Thrones subtitlers followed these best practices: In the original HBO release