Lecture Multilingual Subtitle Helper

Shows an on-device translation alongside the original captions on Udemy lectures.

Lecture Multilingual Subtitle Helper displays an additional translated subtitle alongside the original captions shown by the Udemy player. Key features • Original and translated subtitles shown together • 39 selectable languages with one-click source/target swap • English interface with automatic Korean localization on Korean Chrome • Quality mode that waits for sentence completion and uses recent context • Terminology cleanup for technical lectures • Draggable translated subtitle overlay • Automatic reconnection after lecture or player changes • Compatible with Udemy's “show below video” caption option • No ads, analytics, or external translation server How to use 1. Open a captioned Udemy lecture in desktop Chrome 138 or later. 2. Turn on the source-language captions from Udemy's CC menu. 3. Open the extension and choose the source and target languages. 4. Select “Enable multilingual subtitles.” 5. For a new language pair, wait for Chrome to finish downloading its language pack. Notes • The extension does not perform speech recognition. The lecture must provide source captions. • Available language pairs and language-pack availability depend on Chrome and the user's environment. • Caption text is processed locally with Chrome's Translator API and is not sent to an external server by the extension. • Refresh lecture tabs that were already open before installation. • The extension does not bypass course access controls or download course videos. Udemy is a trademark of Udemy, Inc. This independent extension is not affiliated with, endorsed by, or sponsored by Udemy.