© 2026 Quadlingua

Legal

Privacy & Data Protection Policy

Last Updated: 14 February 2026

At TEAM DIGITAL SERVICES OÜ (hereinafter referred to as "Quadlingua", "Company", "We", or "Us"), we prioritize the privacy and data security of our users ("You", "Student", "Tutor"). This policy is prepared in full compliance with the Turkish Law on the Protection of Personal Data No. 6698 ("KVKK") and the EU General Data Protection Regulation ("GDPR").

1 Data Controller

Your personal data is processed by TEAM DIGITAL SERVICES OÜ as the data controller within the scope explained below and in accordance with legal frameworks.

2 Personal Data We Collect

To ensure service quality, the following data categories are processed:
  • Identity Data: Name, surname, date of birth, profile picture.
  • Contact Data: Email address, phone number, country, and timezone.
  • Financial Data: Masked credit card info and payment history (Full card numbers are never stored on our servers).
  • Audio/Visual Data: Lesson notes, chat logs, and (with explicit consent) lesson video recordings.
  • Transaction Security Data: IP address, device info, and log records.

3 Purposes of Processing

Your data is processed for the following purposes:
  • Execution and tracking of educational services between tutor and student.
  • Managing membership processes and ensuring account security.
  • Processing payment services (collection, transfer, refunds).
  • Fulfilling legal obligations (Invoicing, tax regulations).
  • Managing customer satisfaction and tracking requests/complaints.

4 Method and Legal Basis of Collection

Your personal data is collected automatically or semi-automatically via the website, mobile app, email, live support, and third-party integrations (Google Calendar, Stripe). Our legal bases include "Performance of a contract," "Compliance with a legal obligation," and "Explicit consent."

5 AI and Automated Decision Making

Quadlingua may use Artificial Intelligence (AI) algorithms to recommend the most suitable tutor and personalize your learning path. These algorithms analyze your lesson history and preferences. No "automated decision" with legal consequences is made about you in this process.

6 Data Sharing with Third Parties

Your data may be shared with the following parties as required by the service:
  • Payment Infrastructure: Stripe and local banks (For payment processing).
  • Video Conferencing: Google Meet and Zoom (Technical data for lesson infrastructure).
  • Cloud Services: Amazon Web Services (AWS) (For data hosting).
  • Legal Authorities: Law enforcement and courts upon valid legal request.

7 International Data Transfers

Due to our headquarters being in Estonia and our use of global cloud infrastructure (AWS), your data may be stored on secure servers outside your country of residence. These transfers are conducted in full compliance with KVKK Article 9 and GDPR standards.

8 Data Retention and Destruction

Your personal data is retained for the periods specified in relevant legislation (e.g., 10 years for commercial records). Upon expiration or request, your data is irreversibly deleted, destroyed, or anonymized.

9 Cookies and Tracking Technologies

We use Essential, Functional, Analytical, and Marketing cookies to improve your experience. You can change your cookie preferences at any time via your browser settings.

10 Children's Privacy (COPPA)

Quadlingua does not knowingly process data from children under 13 (or under the age of majority in their jurisdiction) without parental consent. Accounts unverified by a parent will be suspended immediately.

11 Data Subject Rights (KVKK & GDPR)

Under Article 11 of the Turkish KVKK and GDPR, you have the right to learn whether your data is processed, request correction of errors, request deletion (Right to be Forgotten), and claim compensation for damages due to unlawful processing.

12 Security Measures

We implement high-level security measures including SSL/TLS encryption, Web Application Firewalls (WAF), Two-Factor Authentication (2FA), and regular penetration testing.

13 Commercial Communication

We may send you campaign and announcement emails based on the consent you provided during registration. You can opt-out at any time using the "Unsubscribe" link in the emails.

14 Changes to This Policy

This policy may be updated based on legal regulations and changes in our services. Significant changes will be notified to you via email or platform notifications.

15 Contact

To exercise your privacy rights, you can submit your requests to our Data Protection Officer at privacy@quadlingua.com.

© 2026 TEAM DIGITAL SERVICES OÜ. All rights reserved.

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