# Privacy Policy for LinguoLand
**Effective Date:** November 18, 2025
Thank you for using LinguoLand! This Privacy Policy explains what information we collect, how we use it, and your choices regarding your information.
## 1. Information We Collect
To provide a personalized learning experience, we collect the following types of information:
* **Account Information:** When you register for an account, we collect your **email address** and a hashed version of your **password**. Your email is used for account identification and communication.
* **Learning Data:** We collect information about your vocabulary learning progress, including the words you interact with, their familiarity status (unknown, learning, known), your familiarity level, lookup counts, and the dates you last encountered them. This data is linked to your user account to sync your progress across devices.
* **Contextual Data:** To provide AI-powered features like "Contextual Definition" and "Sentence Translation," the extension sends the text of the sentence or paragraph containing the word you clicked to our secure server for processing.
* **Technical Data:** We may collect anonymous technical data, such as extension version and feature usage statistics, to improve our service. This data is not linked to your personal account.
## 2. How We Use Your Information
We use the information we collect for the following purposes:
* **To Provide and Personalize the Service:** To highlight words on web pages according to your learning status and sync your vocabulary across devices.
* **To Enable AI Features:** The contextual data is sent to our server and a third-party AI provider to generate relevant definitions and translations.
* **To Improve Our Service:** We analyze aggregated and anonymized data to understand usage patterns and improve the functionality and user experience of LinguoLand.
* **For Account Management:** To authenticate you, manage your account, and provide customer support.
## 3. Data Sharing and Third Parties
We do not sell your personal data. We only share data in the following limited circumstances:
* **AI Service Provider:** For our AI-powered features, contextual data (sentences or paragraphs from web pages you browse) is sent to our third-party AI service provider, **Dashscope (by Alibaba Cloud)**, for processing. Their use of this data is governed by their privacy policy. We do not send any of your personal account information to them.
* **Service Providers:** We may use third-party companies to host our servers and databases. These providers only have access to the data necessary to perform these tasks on our behalf and are obligated not to disclose or use it for any other purpose.
## 4. Data Security
We implement industry-standard security measures to protect your information from unauthorized access, alteration, or destruction. Your password is encrypted (hashed) before being stored, and all communication between the extension and our server is encrypted using HTTPS.
## 5. Your Rights and Choices
You have the right to access, update, or delete your data. From the LinguoLand Options page, you can:
* View and manage your vocabulary list.
* Export your entire vocabulary data.
* Delete your account (which will permanently remove all associated data).
## 6. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. We encourage you to review this Privacy Policy periodically for any changes.
## 7. Contact Us
If you have any questions about this Privacy Policy, please contact us at: **xxih.lnznx@gmail.com**