☰

Google Translate Auto Language Enhanced

Automatically set the target language to English based on detected source language changes and auto-trigger translation if page language differs from browser language.

  1. // ==UserScript==
  2. // @name        Google Translate Auto Language Enhanced
  3. // @namespace   https://greasyfork.org/en/users/1030895-universedev
  4. // @version     2.5
  5. // @author      UniverseDev
  6. // @license     GPL-3.0-or-later
  7. // @description Automatically set the target language to English based on detected source language changes and auto-trigger translation if page language differs from browser language.
  8. // @match       *://translate.google.*/*
  9. // @noframes
  10. // ==/UserScript==
  11.  
  12. "use strict";
  13.  
  14. const targetLang = "en";
  15. const browserLang = navigator.language.split('-')[0];
  16.  
  17. function setTargetLanguage() {
  18.     const selector = `[data-language-code="${targetLang}"]`;
  19.     const targetTab = document.querySelector(selector);
  20.     if (targetTab && targetTab.getAttribute("aria-selected") !== "true") {
  21.         targetTab.click();
  22.     }
  23. }
  24.  
  25. function observeSourceLanguage() {
  26.     const sourceLangTab = document.querySelector("[role=tablist] [aria-selected='true']");
  27.     if (sourceLangTab) {
  28.         const observer = new MutationObserver(() => {
  29.             setTargetLanguage();
  30.         });
  31.         observer.observe(sourceLangTab, { characterData: true, subtree: true });
  32.     }
  33. }
  34.  
  35. function detectPageLanguage() {
  36.     const pageLang = document.documentElement.lang || document.querySelector("html").getAttribute("lang");
  37.     if (pageLang && pageLang !== browserLang) {
  38.         console.log(`Detected page language (${pageLang}) differs from browser language (${browserLang}). Triggering translation.`);
  39.         setTargetLanguage();
  40.     }
  41. }
  42.  
  43. function init() {
  44.     setTargetLanguage();
  45.     observeSourceLanguage();
  46.     detectPageLanguage();
  47. }
  48.  
  49. window.addEventListener("load", init);