Sublern.

Sublern — Instant Subtitle Word Translator

Transform every video into a personalized language lesson with Sublern. This free Chrome extension delivers instant word translations, native pronunciation, and real-world examples directly over YouTube, Netflix, TED, and 10+ streaming platforms — no pausing, no tab-switching, no friction.

Product Highlights

• Word-by-word translation: Hover any subtitle word to reveal precise meanings without losing context.
• Real-world examples: Access 3 native usage sentences showing exactly how words function in authentic speech.
• TTS pronunciation: Click to hear crystal-clear native voice pronunciation for every word.
• Auto-pause on hover: Video intelligently pauses while you study translations, then resumes automatically.
• Personal dictionary: Save words with one click to build your own reviewable vocabulary collection.
• 20+ interface languages: Fully localized experience from English and Spanish to Japanese and Russian.
• Universal platform support: Seamlessly works across YouTube, Netflix, TED, Udemy, Disney+, Prime Video, Twitch, and more.
• Zero-setup installation: No account required, no configuration — functional in 30 seconds.

Use Cases

• Language immersion learning: Watch foreign films and shows while acquiring vocabulary naturally in context.
• Academic video study: Master specialized terminology in lectures, courses, and educational content without interruption.
• Professional skill development: Understand industry-specific language in tutorials, conferences, and training videos.
• Casual entertainment with learning: Turn leisure streaming into productive language exposure effortlessly.

Target Audience

Sublern serves language learners at all levels — from beginners building foundational vocabulary to advanced speakers refining nuanced usage — who consume video content on popular streaming platforms and prefer learning through authentic, contextual exposure rather than traditional study methods.