为什么值得关注

它提供了一个注重隐私、无需后端的语言学习方案，让用户能在视频播放器中直接与字幕交互，结合实时翻译和单词保存功能。

适合谁使用

通过影视学习语言的学习者
在 Amazon Prime Video 或 Kino.pub 上观看视频的 Chrome 用户
希望从媒体内容中积累词汇的自学者

典型使用场景

观看外语电影时使用双字幕提升听力理解
点击不熟悉的单词立即查看翻译
将有用单词保存到私密单词本以供后续复习
以 CSV 或 JSON 格式导出单词本用于外部学习工具

项目优势

同时显示原文和翻译的双字幕
直接在字幕覆盖层上点击查词
单词本完全存储在本地 Chrome 中，保护隐私
无后端、无遥测的隐私优先设计

使用前须知

目前仅支持 Amazon Prime Video 和 Kino.pub
在线翻译功能依赖 Chrome 内置、LibreTranslate、MyMemory 或用户自备 DeepL API 密钥
扩展仅限 Chrome 浏览器，且本地测试需要开启开发者模式

README 快速开始

Dual Subtitles: Learn Languages with Movies

Dual Subtitles is a free Chrome extension for watching films and series with two subtitle lines: the original subtitle line and a translation underneath it.

It is built for language learners who want to stay inside the video player: click words, translate them, and save useful words to a private vocabulary book.

Chrome Web Store

Supported Sites

Amazon Prime Video
Kino.pub

You can vote for more supported websites on the project website: https://www.y-markov.com/dual-subtitles/vote

Features

Dual subtitles: original line plus translated line.
Click-to-translate words directly in the subtitle overlay.
Private vocabulary book stored locally in Chrome.
CSV and JSON vocabulary export.
Chrome built-in translation when available.
Optional online fallback translators: LibreTranslate and MyMemory.
Optional DeepL support with the user's own API key.
Subtitle size, position, timing offset, and language settings.

Privacy

The extension has no developer backend and does not collect analytics or telemetry.

Settings and vocabulary are stored locally with chrome.storage.local. When Chrome built-in translation is available, translation is handled by Chrome. If an online translator is selected, only the text being translated is sent to that selected service.

See PRIVACY.md for details.

Project Structure

extension/                 Chrome extension source
website/                   Static project website pages
store-assets/screenshots/  Chrome Web Store screenshots
scripts/                   Release helper scripts
CHROME-STORE-DESCRIPTION.* Store listing copy
STORE-NOTES.md             Store submission notes
PRIVACY.md                 Privacy policy
LICENSE                    License

Local Development

Open chrome://extensions.
Enable Developer mode.
Click Load unpacked.
Select the extension folder.
Open Amazon Prime Video or Kino.pub and start a video with subtitles.

After editing the extension, reload it on chrome://extensions and refresh the video page.

Build a Store Package

Run from the repository root:

powershell -NoProfile -ExecutionPolicy Bypass -File .\scripts\build-extension-zip.ps1

The script creat

dualsubtitles