SubTranslate provides synchronized subtitle translations for Stremio using release-matched subtitles from OpenSubtitles and AI translation through Gemini.
How it works:
- Searches OpenSubtitles for matching English subtitles and ranks them based on the video hash and/or release filename.
- Preserves the original subtitle timestamps — only the subtitle text is translated.
- Supports 37 target languages. English is currently the supported source language.
- Completed translations are cached and can be reused for the same safely matched release, so previously translated subtitles can load instantly.
- Outputs TV-compatible VTT subtitle tracks.
Setup: OpenSubtitles credentials are required to find subtitle sources. A Gemini API key is only required when a new translation needs to be created.
Configure and install the addon at:
https://subtranslate.org/configure
Provider credentials are encrypted on the server and are never included in the addon manifest URL.