Lokia is a browser extension and web-based platform designed to facilitate language learning through real video content on YouTube and Netflix. It enables users to watch videos with dual subtitles—displaying both the original language and a translation simultaneously—and provides instant word lookup by allowing users to click any word or phrase in the subtitles for immediate translation. The tool supports learning from over 50 languages, offering a broad range of linguistic options for users seeking to expand their vocabulary and comprehension skills through authentic media.
Key features of Lokia include interactive subtitles, personalized vocabulary wordlists, and smart flashcards powered by the FSRS (Free Spaced Repetition Scheduler) algorithm. This algorithm schedules vocabulary reviews at scientifically optimized intervals, adapting to user performance to maximize long-term retention and efficient study sessions. Users can save words directly from subtitles to custom wordlists, organize their vocabulary, and review them with context-rich examples and spaced repetition. The extension also provides detailed progress tracking, displaying knowledge levels for each word and offering statistics to monitor learning progress.
Lokia is available as a browser extension for Chrome, Firefox, and Edge, and works on both desktop and mobile platforms. The extension functions on YouTube and Netflix videos that have available subtitles, transforming regular screen time into an opportunity for language acquisition. The platform supports both light and dark modes, and the web app is accessible from any modern browser, ensuring flexibility and convenience for a wide range of users.
The service offers a free plan, which includes unlimited subtitle translations, flashcards with spaced repetition, and vocabulary saving. A premium plan is available that unlocks additional features such as unlimited wordlists, mini-games, and the ability to import personal videos. Lokia positions itself as an innovative language learning tool that leverages real-world content and adaptive technology to help users build vocabulary and master new languages naturally.
Lokia App is an Education & learning product. It focuses on learning new languages efficiently by leveraging real video content and interactive tools. It is built as a consumer product for language learners. Lokia App is free to use. It runs on the web and embeddable surfaces.
Lokia App first shipped in 2025. PulseGate's similarity index finds few close equivalents — Lokia App occupies a relatively distinct niche. Key capabilities include dual subtitles, instant translation, and smart flashcards. The interface is available in English and French.
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