A low-quality rip would ruin these moments. This is where the release excels.
To find and use English subtitles specifically for the release of Game of Thrones Season 6
No subtitles for Dothraki/Valyrian. Fix: Ensure you have selected the "Forced Subtitles" track. On BluRay, foreign language dialogues are a separate track. In MKVToolNix, you can mark an English track as "Forced" to show them automatically.