Subtitles added to mkv won't show up in jellyfin

[TheDreadPirate]

Yes. You add the SRT file to the folder and give it the same name as the movie, except with the srt extension. There are additional parameters in the file name, like the language (en) and disposition (forced) that Efficient included.

Here is out documentation on external files, not limited to just subtitles.

https://jellyfin.org/docs/general/server...rnal-files