Kvizik is a versatile, white-label platform designed for language schools and tutors, developed over nearly one year of full-time work. This fully operational platform is designed to support teaching workflows, initially aimed at Czech language instruction but adaptable to any language pair. The platform includes a robust quiz engine with eight different modes for comprehensive language learning and tracking progress. Its lesson builder offers a variety of interactive content types, allowing for dynamic lesson creation. Educators benefit from a detailed teacher panel for managing classes and assignments, while students have access to their schedules, homework, and purchase history via a student cabinet. The admin panel provides comprehensive user, course, and content management, while also offering analytics on finance, retention, and quality. Built-in monetization features support multi-currency transactions through Stripe, with AI tools assisting in lesson creation and translation across eight languages. From a technical perspective, Kvizik comprises 86,700 lines of code, 315 API endpoints, and 21 MySQL tables. It’s built on a PHP and MySQL backend with a JavaScript frontend, supporting eight UI languages and five visual themes. The platform is supported by 1,231 automated tests and integrates with Stripe, Google Gemini, Google Cloud TTS, and a content delivery network. Operational costs are minimal, approximately $38 monthly, covering hosting and metered services. It targets language schools and educational agencies, particularly in Central Europe, offering a comprehensive package including source code and brand assets. Despite being pre-revenue, the platform is fully monetized and ready for deployment.