LangTwo Terms of Service

1. General Provisions

1.1 Purpose

1.2 Definitions

1. “Service” refers to the AI-based practical language learning platform LangTwo provided by the Company.
2. “Member” refers to an individual who agrees to these Terms and enters into a service use agreement with the Company.
3. “Today Energy” refers to the daily learning capacity provided based on AI model usage.
4. “Scenario” refers to language learning content based on real-life situations.
5. “Subscription” refers to the use of premium features of the Service through recurring payments.

1.3 Effect and Amendment of the Terms

1. These Terms take effect when posted on the Service screen or otherwise notified to Members.
2. The Company may amend these Terms to the extent that such amendments do not violate applicable laws and regulations.
3. When amending the Terms, the Company shall specify the reason for the amendment and the effective date, and notify Members at least seven (7) days prior to the effective date. In the case of amendments unfavorable to Members, the Company shall notify at least thirty (30) days in advance.

2. Service Use Agreement

2.1 Formation of the Agreement

1. The service use agreement is established when a Member agrees to these Terms and the Company approves the application.
2. Membership registration is available via email or Google social login.
3. The Company may refuse to approve any application that falls under any of the following:
   • The applicant is not using their real name or is using another person’s name.
   • The applicant provides false information or omits required information requested by the Company.
   • The Company determines that registration as a Member would cause significant technical difficulties.

2.2 Modification of Member Information

3. Provision and Modification of the Service

3.1 Service Content

1. Language Learning Service
   • Support for 15 languages (English, Korean, Chinese, Japanese, Spanish, French, German, Portuguese, Italian, Russian, Dutch, Turkish, Vietnamese, Indonesian, Thai)
   • AI-based scenario-driven conversational learning
   • Four-participant ecosystem (User, Suggestion AI, Improvised AI, Narration AI)
2. Personalized Services
   • 3-Stage UX (Immersion, Resonance, Achievement)
   • Learning progress and achievement management
   • Customized review system
3. Additional Services
   • Learning statistics and analytics
   • Cloud-based learning data synchronization

3.2 Service Availability

1. The Service is, in principle, available 24 hours a day, 365 days a year.
2. However, the Service may be restricted in the following cases:
   • Maintenance, replacement, malfunction, or communication failure of computer or information and communication facilities
   • System failure not attributable to the Company’s willful misconduct or gross negligence
   • Other force majeure events

3.3 Today Energy System

1. Free Members are provided with a fixed amount of Today Energy each day.
2. Paid subscription Members receive additional Today Energy.
3. Today Energy does not carry over to the next day and resets at midnight daily.
4. A feature to earn additional Today Energy by watching advertisements will be introduced in the future.

4. Payment and Refunds

4.1 Payment Methods

1. Service fees can be paid by in-app purchase through the App Store (Apple) or Google Play in the app, or through PayPal on the web.
2. Subscription plans are as follows (for new subscriptions on or after October 21, 2026):
   • Monthly Plan: $8.99/month
   • Yearly Plan: $59.99/year (44% discount from $107.88, the price of twelve months on the Monthly Plan)
   Subscriptions started before that date renew at the price in effect when they were started, until the Company gives notice otherwise.

4.2 Cancellation and Refunds

• Paid plans are digital services available from the moment of purchase. Except where applicable law provides otherwise, payments are non-refundable.
• If you cancel a subscription, it will not renew on the next billing date. You keep access to paid features until the end of the period you have already paid for, and no refund is given for the remaining period.
• The Company may grant a refund at its discretion in individual cases. Doing so does not create a right to the same refund in the future.

• Billing, cancellation and refunds are handled by Apple under Apple’s policies. The Company cannot issue refunds for App Store purchases.
• Refund requests are made to Apple at reportaproblem.apple.com.
• When you request a refund, the Company may provide Apple, at Apple’s request, with usage information about the subscription.

• Billing, cancellation and refunds are subject to Google Play’s policies.
• Refund requests are made to Google Play. After the period set by Google Play, the Company handles requests under this section.

• A PayPal purchase is an automatically renewing subscription. A monthly plan is charged every month and a yearly plan every year to the payment method linked to your PayPal account.
• The Company may offer first-time subscribers a 7-day free trial. The first charge is made on the day the trial ends, and you are not charged if you cancel during the trial.
• You can cancel at any time on the subscription management screen of the Service or in the automatic payments settings of your PayPal account. After you cancel, you can keep using paid features until the trial or the period you have already paid for ends.
• If you switch from a monthly plan to a yearly plan, the yearly plan starts and is charged on the day your paid period ends.
• You may request a full refund within 7 days of payment if you have not used any paid feature.
• Once you start using paid features, the right to withdraw is restricted. The Company tells you this before payment and lets you try the service for free.
• Send refund requests to admin@langtwo.com. Refunds are made to the original payment method within the period required by applicable law.
• If a payment is refunded or charged back, the related subscription ends at that time.

• If the service is provided differently from what was displayed, advertised or agreed, you may withdraw within the period set by applicable law.
• If the law of your country of residence gives you a more favorable right to withdraw, cancel or receive a refund, that law prevails.
• If you live in the European Economic Area, the United Kingdom or Switzerland, you may withdraw within 14 days of payment, unless you agreed to immediate access and acknowledged that you would lose the right to withdraw.

• If paid features are unavailable for 24 consecutive hours or more for reasons attributable to the Company, the Company will extend your access by the period you could not use.

• Requests made after the period in 4.2.4 or after paid features have been used
• Requests made after access was restricted for a violation of these Terms
• Requests made by improper means, including unauthorized use of a payment method

4.3 Payment Information Management

1. The Company does not store payment information such as card numbers directly. Payments are processed by Apple, Google, or PayPal.
2. Recurring subscriptions started in the app can be managed or canceled directly in the subscription settings of the App Store or Google Play, and those started on the web on the subscription management screen of the Service or in the automatic payments settings of your PayPal account. Unless canceled, a subscription renews automatically on the next billing date.

5. Member Obligations

5.1 Management of Member Information

1. Members must comply with applicable laws, these Terms, usage guidelines, and notices posted within the Service.
2. Members are responsible for carefully managing their account information.
3. It is recommended that Members change their passwords periodically.

5.2 Prohibited Conduct

1. Service-Related Conduct
   • Altering information posted on the Service
   • Interfering with the operation of the Service
   • Disrupting other Members’ use of the Service
2. Technical Misuse
   • Accessing the Service using automated means without the Company’s approval
   • Exploiting vulnerabilities in the Service for abnormal use
   • Hacking or distributing viruses
3. Content-Related Conduct
   • Inputting obscene, violent, or antisocial content
   • Transmitting content that defames others
   • Transmitting content that infringes on others’ copyrights or other rights
4. Commercial Use
   • Using the Service for profit-making activities
   • Using the Service for advertising or promotional purposes

6. Company Obligations

6.1 Obligation to Provide the Service

1. The Company shall make its best efforts to provide continuous and stable Service.
2. The Company shall establish a security system to protect personal information and ensure safe Service use.
3. The Company shall promptly handle any Member’s opinions or complaints deemed legitimate in relation to the Service.

6.2 Obligation to Protect Personal Information

7. Restriction of Service Use

7.1 Grounds for Restriction

1. Violation of these Terms
2. Interference with the normal operation of the Service
3. Acts that damage or disadvantage others
4. Use of the Service for acts prohibited by law or these Terms

7.2 Types of Restrictions

1. Warning: Notice for minor violations
2. Temporary Suspension: Suspension of Service use for up to 7 days
3. Restriction: Service use restriction for up to 30 days
4. Account Deletion: Permanent ban for serious violations

8. Suspension of the Service

8.1 Grounds for Suspension

1. Unavoidable circumstances such as maintenance of facilities
2. Suspension of telecommunications services by a common carrier under the Telecommunications Business Act
3. National emergencies, facility failures, or service overloads that hinder normal Service operation
4. Other significant reasons making continued Service provision inappropriate

8.2 Notice of Suspension

9. Intellectual Property Rights

9.1 Company’s Intellectual Property

1. Intellectual property rights related to the design, text, scripts, graphics, software, and other elements used in the Service belong to the Company.
2. Members shall not reproduce, transmit, publish, distribute, broadcast, or otherwise use for commercial purposes, or allow third parties to use, any information obtained through the Service without the Company’s prior consent.

9.2 AI-Generated Content

1. AI-generated scenarios, dialogues, evaluations, and other materials provided through the Service are the intellectual property of the Company.
2. Rights to the combination of a Member’s learning data and AI-generated content are jointly owned by the Company and the Member.

10. Liability and Disclaimer

10.1 Disclaimer of Liability

1. The Company shall not be liable for failure to provide the Service due to force majeure events such as natural disasters.
2. The Company shall not be liable for any Service disruption caused by the Member’s fault.
3. The Company does not guarantee any specific learning outcomes or results expected by Members through the use of the Service.

10.2 Compensation for Damages

1. If a Member causes damage to the Company by violating these Terms, the Member shall compensate the Company for all resulting damages.
2. If the Company causes damage to a Member through willful misconduct or gross negligence, the Company shall be liable for compensation in accordance with applicable laws.

11. Dispute Resolution

11.1 Governing Law and Jurisdiction

1. These Terms shall be governed by and construed in accordance with the laws of the Republic of Korea.
2. Any litigation arising from or related to the use of the Service shall be brought before the court having jurisdiction over the location of the Company’s principal office.

11.2 Dispute Mediation

12. Miscellaneous

12.1 Notices

1. The Company may provide notices to Members via the email address designated by the Member.
2. For notices to an unspecified number of Members, posting on the Service notice board for at least one (1) week shall be deemed sufficient notice.

12.2 Operational Policy

12.3 Language