You can specify language settings for your Plex account related to how audio and subtitle tracks are chosen when playing media from a Plex Media Server (both one you run yourself as well as a shared server). These can be accessed under the Audio & Subtitle Settings section of your account profile.
To find the settings when signed in to Plex Web App, open the user menu at the top right, choose Account, then choose Audio & Subtitle Settings on the left.
Related Page: Account: Audio & Subtitle Settings
Audio & Subtitle Settings
These settings determine how Plex will try to select audio and subtitle tracks when playing media in a Plex app while signed in to your account.
Note: If you ever manually change the audio or subtitle track for an item in your Plex library (either during playback or on the preplay screen), that manual selection will always override any automatic selection (see below) that would have otherwise happened. Once you manually select something, it will never automatically change again.
Automatically Select Audio and Subtitle Tracks
Automatically select audio or subtitle tracks in your preferred language when possible. If a video file has multiple audio/subtitle tracks, a track whose language matches your preferred language will be selected even if it is not the first track.
Tip!: You must enable this option in order for the rest of the audio/subtitle settings on this page to be used.
Preferred Audio Language
Plex will attempt to automatically select an audio track with the language set here in media with multiple audio tracks. The following logic will be used to try to choose the most appropriate audio track:
- If an audio track that matches your preferred audio language is found, the first one will be used, else
- If there are multiple unknown language audio tracks, the first track will be used, else
- If there is a single audio track, it will be used even if the language doesn’t match
For the best results, you’ll want to make sure that your audio tracks are correctly flagged with the language (see below).
Preferred Subtitle Language
Set your preferred subtitle language. This setting requires that the subtitle track be correctly flagged with the language (see below).
Auto-Select Subtitle Mode
Choose when subtitles will be displayed. The options are:
Subtitles will not be selected automatically when playing a video; they must be manually selected within the Plex app if you wish for them to be displayed.
Shown with Foreign Audio
If an audio track matching your preferred audio language is not found, Plex will try to display the most appropriate subtitle track using the following logic:
- If a subtitle that matches your preferred subtitle language is found, the first one will be displayed, else
- If there is a single external subtitle file (i.e. a subtitle file next to the video file), it will be shown even if the language doesn’t match, else
- If there are no external subtitle files, but there is a single embedded subtitle, it will be shown even if the language doesn’t match, else
- If there are multiple external or embedded subtitle files and none of them match your preferred subtitle language, do nothing (we cannot know which subtitle is likely to be correct and don’t want to randomly choose a subtitle in an incorrect language)
Subtitles will be automatically displayed using the following logic:
- If a subtitle that matches your Preferred Subtitle Language is found, it will be displayed—even if the audio language matches the Preferred Audio Language, else
- If there is an external subtitle file (e.g. a subtitle file next to the video file) it will be shown even if the language doesn’t match, else
- If there is a single subtitle embedded in the file, it will be used even if the language doesn’t match
Audio and Subtitle Track Languages
In order for Plex to be able to intelligently choose an audio or subtitle track, it first has to know what language(s) the available audio and subtitle tracks actually are.
For tracks embedded within the file, the language needs to be set appropriately for the audio or subtitle track. If the language is not set, you can do so using various tools (e.g. mkvtoolnix for MKV files).
Tip!: If the language for a track is not set (i.e. it is detected as “unknown”), it will be treated as if it does not match your preferred language settings.
For external subtitle files, you’ll want to ensure that the filename correctly includes the language code.
Related Page: Adding Local Subtitles to Your Media