Privacy Policy

Last updated: November 10, 2026

This Privacy Policy explains how Learn languages - youtube dual captions and sentense capture ("the Extension", "we", "our") handles user data.

1. Data Collection & Storage

We respect your privacy. The Extension is designed to operate locally on your device with minimal external data interaction:

• Saved Sentences & Vocabulary: Sentences, target words, and practice scores you save are stored exclusively on your device using Chrome's local storage (chrome.storage.local). We do not operate external servers to collect or store your saved library.
• User Preferences: Extension settings (such as UI scale, colors, and target/native language choices) are stored locally in your browser.

2. Network Requests & Third-Party Services

To provide core functionalities, the Extension interacts with the following external endpoints:

• Google Translate API: Subtitle text and selected words are sent to Google's public translation endpoint (translate.googleapis.com) to generate real-time translations for captions and dictionary lookups.
• YouTube: The Extension interacts with YouTube's player API and web page context solely to retrieve available subtitle tracks for videos you watch.

3. Data Sharing & Analytics

We do not sell, rent, track, or share your data with advertisers, data brokers, or third parties. We do not use third-party analytics or tracking scripts inside the Extension.

4. Data Retention & Control

All stored data remains on your computer. You can export your saved data (sentences in JSON format, words in CSV format) or clear your data at any time through the Extension's Settings page or by clearing your browser data.

5. Contact & Support

If you have any questions or concerns regarding this Privacy Policy, please reach out via the official Chrome Web Store developer support link or your support channel.