: Software like Subtitle Edit or Aegisub allows you to manually time and type translations.
: Media players display "Unknown" when the subtitle track lacks an ISO-639 language tag. This is common with files extracted from DVRs or unofficial sources. How to Fix : Code Unknown subtitles English
If you are seeing "Unknown" in your media player (like Plex or VLC) instead of "English," it is a metadata issue rather than a content issue. : Software like Subtitle Edit or Aegisub allows
: Use a tool like MKVToolNix or mkvpropedit to edit the header and set the language flag to "English". Code Unknown subtitles English