Xiaomi
Enable or Disable Captions for Supported Apps auf Xiaomi
Captions on Xiaomi phones are controlled through a system-wide accessibility feature, not through each individual app. If a supported app does not show captions during playback, the Show captions switch in accessibility settings is likely turned off.
This setting affects apps that support the caption preferences built into Android and MIUI, meaning captions only appear where the app hooks into this system feature. Streaming apps without that integration will show subtitles only when you enable them inside the app itself.
To turn captions on or off, go to Settings ➔ Additional settings ➔ Accessibility ➔ Hearing ➔ Caption preferences. Toggle Show captions to turn the feature on or off for supported apps.
Once enabled, adjust the caption size and style, or open More options to build a custom style, including font, edge style, and background opacity. If captions still look unreadable after adjusting size, check whether the background is transparent, since some content combines poorly with a light backdrop.
If an app still does not show captions after enabling this setting, it likely manages subtitles on its own and ignores the system caption preferences.