Greasy Fork is available in English.
Forces all YouTube videos to play in their original language audio instead of the AI dubbed language. Works in both normal videos and shorts. Can be manually overridden per-video.
// ==UserScript==
// @name YouTube Prevent Auto-Dub
// @name:zh-TW YouTube 防止自動配音
// @name:zh-CN YouTube 防止自动配音
// @name:ja YouTube 自動吹き替え防止
// @icon https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @author ElectroKnight22
// @namespace electroknight22_prevent_auto_dub_namespace
// @version 0.2.6
// @match *://www.youtube.com/*
// @match *://m.youtube.com/*
// @match *://www.youtube-nocookie.com/*
// @exclude *://www.youtube.com/live_chat*
// @require https://update.greasyfork.org/scripts/549881/1698944/YouTube%20Helper%20API.js
// @run-at document-idle
// @grant none
// @inject-into page
// @license MIT
// @description Forces all YouTube videos to play in their original language audio instead of the AI dubbed language. Works in both normal videos and shorts. Can be manually overridden per-video.
// @description:zh-TW 強制所有 YouTube 影片以原始語言音訊播放,而不是 AI 配音的語言。適用於一般影片和 Shorts。可針對單一影片手動關閉。
// @description:zh-CN 强制所有 YouTube 视频以原始语言音频播放,而不是 AI 配音的语言。适用于一般视频和 Shorts。可针对单个视频手动关闭。
// @description:ja すべてのYouTube動画をAI吹き替えではなく、元の言語の音声で強制的に再生します。通常の動画とショート動画の両方で機能します。動画ごとに手動で無効にすることもできます。
// ==/UserScript==
/*jshint esversion: 11 */
/* global youtubeHelperApi */
(function () {
'use strict';
const api = youtubeHelperApi;
if (!api) return console.error('Helper API not found. Likely incompatible script manager or extension settings.');
let canUpdate = false;
const checkAutoDub = (event) => {
if (!canUpdate && !event.detail.isInit) return;
try {
const playingLanguage = event.detail.playingLanguage;
if (!playingLanguage) throw new Error('Unable to determine the current audio track.');
const isAutoDubbed = event.detail.isAutoDubbed;
if (!isAutoDubbed) return;
console.log('Auto-dub detected, trying to undo...');
const originalLanguage = event.detail.originalLanguage;
if (!originalLanguage) throw new Error('Unable to determine the original audio track.');
api.apiProxy.setAudioTrack(originalLanguage);
console.log(`Auto-dub undo successful. Audio track reverted from ${playingLanguage} to ${originalLanguage}.`);
} catch (error) {
console.warn('Failed to prevent YouTube auto-dubbing.', error);
} finally {
canUpdate = false;
}
};
api.eventTarget.addEventListener('yt-helper-api-playback-language-updated', checkAutoDub);
api.eventTarget.addEventListener('yt-helper-api-ready', () => {
canUpdate = true;
setTimeout(() => { canUpdate = false; }, 1000)
});
})();