Trancy - YouTube AI Bilingual Subtitles & Language Reactor Pro

Trancy - YouTube AI Bilingual Subtitles & Language Reactor Pro

Trancy not only provides bilingual subtitles support for platforms like YouTube, Netflix, Udemy, Disney+, TED, edX, Kehan, Coursera, but also offers AI word/sentence translation and immersive translation for regular web pages. It is a true all-in-one language learning assistant.

Created Aug 30, 2025
Updated May 31, 2026

What it is

Trancy is a language learning tool that provides AI-powered bilingual subtitles for video platforms and translation for web content. It is designed for language learners who want to improve their listening, reading, and comprehension skills by using authentic content from YouTube, Netflix, news sites, and technical forums.

Main Features

Video Subtitles & Learning

  • AI-generated bilingual subtitles for YouTube, Netflix, HBO Max, TED, edX, and Coursera
  • Two viewing modes: standard theater mode and a dedicated reading mode for focusing on text
  • AI word lookup and grammar analysis for subtitles
  • Intelligent sentence segmentation to improve translation accuracy
  • Listening and speaking practice tools

Webpage Translation & Learning

  • Text selection translation for words and full sentences on webpages
  • AI-driven sentence structure analysis and part-of-speech tagging
  • Full-text immersive translation that displays original and translated text side-by-side
  • Customizable translation engines (Google, DeepL, Microsoft, Open AI)
  • Highlights unfamiliar words during browsing to aid passive memorization

Learning Management

  • A web-based learning center to save and organize content
  • Ability to create personalized decks of favorite videos and sentences
  • Tools for reviewing saved words and example sentences

Additional Utilities

  • Video playback speed control
  • Customizable subtitle font and size adjustments
  • Text-to-speech functionality
  • Support for external web dictionaries
  • Comprehensive keyboard shortcut support

How it works

Learning with Video Content

Users install the Trancy browser extension or mobile app. They can then navigate to a supported video platform like YouTube or Netflix. Trancy overlays AI-generated bilingual subtitles onto the video. Users can click on any word for an instant definition, use reading mode to focus on the text, and save new vocabulary to their personal deck for later review.

Reading and Translating Web Content

While browsing any website, users can select text with their cursor. Trancy provides instant translations and definitions for selected words or sentences. For longer articles, users can use the immersive translation feature via a right-click menu to translate the entire page into a bilingual view for comparative reading.

Personal Review and Practice

Users access their centralized learning center to review all saved words, sentences, and videos. This repository allows for structured revision and practice, turning consumed content into personalized language lessons.

Key Points

  • Utilizes advanced AI and NLP (Natural Language Processing) technologies, including OpenAI, for accurate translations and detailed syntactic analysis.
  • Functions across a wide range of major websites and streaming platforms.
  • Focuses on providing an immersive and contextual learning experience rather than simple word-for-word translation.
  • The tool is designed to integrate seamlessly into a user's existing browsing and video-watching habits.

Additional Details

  • Availability: Offered as a browser extension and a mobile app.
  • Pricing: A dedicated pricing page is available on the Trancy website, indicating both free and paid plans are likely offered.
  • Supported Languages: The service supports numerous languages, including English, Vietnamese, Turkish, Arabic, Russian, French, Spanish, German, Italian, Portuguese, Japanese, Korean, and multiple variants of Chinese.
  • Requirements: Requires a browser that supports extensions or a mobile device to install the app.
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