SubTranslate

SubTranslate is a dual-subtitle learning app that helps you learn foreign languages ​​while watching YouTube videos.

■ Key Features

· Simultaneous display of original subtitles + Korean translation

Two lines of subtitles appear simultaneously on top of the video. You can learn naturally by comparing the words you hear with their meanings at a glance.

· Word-by-word analysis (The app's key differentiator)

Tapping a line of subtitles separates all words appearing in that line, displaying their lemma, part of speech, and contextual meaning. Whether watching a Chinese video, it displays Chinese words; when watching a Japanese video, it displays Japanese words—analyzing the original language of the video exactly as it is, making it optimized for Korean learners to master the local language.

· Works with videos without subtitles

Subtitles are generated using automatic speech recognition (Soniox) even for videos where the uploader has not added subtitles.

· Natural Korean translation

Claude AI understands the context to translate into natural Korean, rather than a literal translation.

· Lightweight usage

No login or sign-up. No ads. Use immediately with just a video ID.

■ Recommended for:

· Those studying English, Chinese, Japanese, Spanish, etc. via YouTube

· Those who find subtitle translation alone insufficient and require word-level analysis

· Those frustrated by the literal translation quality of existing subtitle apps

· Those who found it cumbersome to turn subtitles on and off for each video

■ Supported Languages

Original: All languages ​​recognized by YouTube as subtitles/STT (Simplified/Traditional Chinese, Japanese, English, Spanish, etc.)

Translation: Korean

■ Data & Privacy

No sign-up required. No personal information collected. No ad identifiers. Please refer to the Privacy Policy page for details.

■ Notice

This app is a tool to assist with learning YouTube content, and the video content itself is played in accordance with YouTube policies.