This is an English reference translation of the Japanese Privacy Policy, provided for users who display the app in English. The Japanese text is the only authoritative version. If the two differ, the Japanese text prevails.
The LinguaMile team ("we" or "us") sets out the following about the user information handled in the language-learning app "LinguaMile" (the "Service"). This Policy applies to the Service as provided in Japan.
1. Information We Handle
Depending on the features you use, the Service handles the following information.
- Account information: the account identifier, and the email address and display name of your Google Account
- Information you enter or create: learning goals, descriptions of yourself, notes, source material for learning materials, learning materials you create, and conversation partner settings
- Audio and conversations: recorded audio, transcriptions, conversation content, and audio and text created by AI
- Learning records: dates and times of practice, practice time, assessment and correction results, and review records
- Contract and usage: plan, usage allowances, usage, and purchase information
- Diagnostics and inquiries: error types, app and OS versions, diagnostic information you send, and the content of inquiries and the address for replies
- Communication records: IP address, access date and time, accessed URL, and the type of device and app used for the communication
2. Purposes of Use
- Sign-in and account management
- Conversation with AI, speech recognition, speech synthesis, and creation of learning materials
- Assessment and correction of learning, creating the learning notebook, and supporting review
- Saving and displaying learning materials and learning records
- Managing contracts, usage allowances, usage and payments
- Investigating failures and preventing unauthorized use
- Responding to inquiries and sending important notices
- Aggregation and analysis to improve the Service
3. Sending Information to External Providers
Some features of the Service are processed by external providers' services. We send only the information needed when you use that feature. We entrust these providers with the handling of personal data to the extent necessary for the purposes of use.
- OpenAI
- Use: conversation, transcription of audio, lookups during conversation, creation of learning materials, goals and assessments, and creation of model audio
- Information sent: audio, transcriptions, text you enter, learning materials, the body of source material, and NPC settings
- Country: United States
- Groq, Inc.
- Use: transcription of conversation audio
- Information sent: audio
- Country: United States
- Google LLC
- Use: sign-in, purchase verification, creating audio for the learning notebook and cards, and judging the content and progress of conversations
- Information sent: sign-in information, information used to verify purchases, English text to be read aloud, conversation transcriptions, and conversation and learning settings
- Country: United States
- Microsoft Corporation
- Use: detailed pronunciation assessment in the learning notebook
- Information sent: audio and the English text being assessed
- Country: Japan
- Replicate, LLC
- Use: creating NPC images
- Information sent: prompts made from the NPC's appearance and character settings, and the image being edited
- Country: United States
- Black Forest Labs, Inc.
- Use: creating NPC images
- Information sent: prompts made from the NPC's appearance and character settings
- Country: United States
- Supabase Pte.Ltd.
- Use: brokering sign-in
- Information sent: the identifier, email address and display name of your Google Account
- Country: Singapore
These providers may retain the information they receive for a certain period, for example to monitor misuse. Deleting recordings or conversations in the app does not necessarily delete the information retained by these providers immediately.
4. Provision to Third Parties and Handling Outside Japan
Except where permitted by law, we do not provide personal data to third parties without your consent.
As described in Section 3, some information is handled by providers outside Japan. In accordance with the law, we take measures to ensure that our contractors handle information properly. Details are available from our contact desk.
5. Retention and Deletion
We keep information only as long as needed for the purposes of use and delete information that is no longer needed.
- Learning materials, audio and learning records on your device: until you delete them in the app or uninstall the app
- Diagnostic logs on your device: 14 days; older logs are deleted the next time you use the app
- Account and learning information on our servers: while the account exists; deleted within 30 days after the account is deleted
- Information used temporarily on our servers to process conversations: 24 hours from the last update
- Problem reports and inquiries: 30 days after handling ends
- Usage records (usage and usage allowances): while the account exists
- Purchase records (order number, product, date and time, amount, refunds): 7 years from purchase
- Communication records: 90 days
- Backups: up to 30 days
If you have turned on backup to your Google Account in your device settings, app information may be included in that backup. It is handled under Google's terms.
6. Diagnostic Information and Problem Reports
The Service records diagnostic information on your device to investigate failures. Diagnostic information does not include audio, the text of conversations or learning materials, or sign-in information.
When you report a problem, you can review and choose the description and diagnostic information to send. You can also contact us without attaching diagnostic information. Information you send is used to investigate the problem and to reply.
7. Security Measures
We take necessary and appropriate security measures to prevent unauthorized access, leakage, loss and similar incidents. Our servers are located in the United States and Singapore. We manage information with an understanding of these countries' systems for protecting personal information. If a leak or similar incident occurs, we will investigate its impact and, in accordance with the law, report to the relevant authorities and notify the people affected.
8. Requests for Disclosure and Leaving the Service
You can review and delete the information saved in the app within the app. If you wish us to notify you of the purposes of use of, disclose, correct, stop using, or delete your account or the personal data we hold, stop providing it to third parties, or disclose records of provision to third parties, please contact our contact desk. After confirming your identity, we will respond in accordance with the law. How data on your device is handled when you leave the Service is explained during the procedure. Leaving the Service does not automatically cancel your Google Play subscription. Cancel it on the Google Play subscriptions screen. Refunds follow the store's rules.
9. Use by Minors
The Service is intended for people aged 13 or older. If you are under 18, please use the Service with the consent of a parent or guardian. We confirm that this consent has been obtained when you start using the Service.
10. Contact Desk
Questions and complaints about this Policy and the handling of personal information are accepted through the contact form on the support page (https://support.linguamile.com/support.html).
11. Changes to This Policy
If we change this Policy, we will announce the changes and the date they take effect in the app or on the website. Changes that require consent under the law take effect after we obtain your consent.
Effective date of the Japanese text: November 12, 2026