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Privacy Policy for Lingomon

Last Updated: January 26, 2026

1. Introduction

Lingomon ("we", "our", or "us") respects your privacy. This Privacy Policy explains how we collect, use, and protect your information when you use our Chrome Extension.

2. Data Collection and Usage

2.1. Local Data Storage

All gameplay data, including your "WordDex" (collected words), achievements, battle teams, and stats, is primarily stored locally on your device using Chrome's chrome.storage.local API. This data remains on your machine unless you explicitly choose to sync it via the optional multiplayer features.

2.2. External API Usage

Lingomon connects to the following third-party APIs solely to fetch word definitions, scientific data, and game assets:

  • DictionaryAPI.dev: To retrieve English word definitions.
  • Datamuse API: To determine word frequency and rarity.
  • Context7 API: To provide semantic AI-powered definitions for technical/coding terms.
  • PubChem (NIH): To retrieve chemical data (formulas, molecular weight) for the Chemistry module.
  • Solar System OpenData: To retrieve astronomical data for the Space module.
  • GBIF: To retrieve biological taxonomy data.
  • Korean Learners' Dictionary API: To retrieve Korean definitions.
  • Supabase: Used only if you opt-in to the multiplayer Friend System (to store your Defense Team and fetch Leaderboards).
  • DiceBear API: To generate random robot avatars.

No personal browsing history is sent to these services. Only the specific word you select/catch is transmitted to fetch its definition.

2.3. User Identity (Multiplayer)

If you use the Battle Arena features:

  • We generate a random anonymous User ID.
  • We store your chosen display name, avatar, and battle team configuration in our cloud database.
  • We do not collect email addresses or real names.

3. Permissions

The extension requests the following permissions:

  • Context Menus: To allow you to right-click words to "catch" them.
  • Storage: To save your game progress locally.
  • Host Permissions: To connect to the definition APIs listed above.

4. Data Security

Communication with external APIs is performed over secure HTTPS connections. Your local data remains on your machine and is subject to your browser's security protections.

5. Contact

If you have questions about this policy, please open an issue on our GitHub Repository.