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Google-Maps-Language-Switcher

A Greasemonkey/Tampermonkey script which let you switch the interface language of Google Maps quickly.

  1. // ==UserScript==
  2. // @name         Google-Maps-Language-Switcher
  3. // @namespace    http://tampermonkey.net/
  4. // @version      0.1
  5. // @description  A Greasemonkey/Tampermonkey script which let you switch the interface language of Google Maps quickly.
  6. // @author       Observer
  7. // @include      /^https?\:\/\/www\.google\..+\/maps/
  8. // @grant        none
  9. // ==/UserScript==
  10. /* jshint -W097 */
  11. 'use strict';
  12.  
  13. (function () {
  14. function setGetParameter(paramName, paramValue)
  15. {
  16.     var url = window.location.href;
  17.     var hash = location.hash;
  18.     url = url.replace(hash, '');
  19.     if (url.indexOf(paramName + "=") >= 0)
  20.     {
  21.         var prefix = url.substring(0, url.indexOf(paramName));
  22.         var suffix = url.substring(url.indexOf(paramName));
  23.         suffix = suffix.substring(suffix.indexOf("=") + 1);
  24.         suffix = (suffix.indexOf("&") >= 0) ? suffix.substring(suffix.indexOf("&")) : "";
  25.         url = prefix + paramName + "=" + paramValue + suffix;
  26.     }
  27.     else
  28.     {
  29.     if (url.indexOf("?") < 0)
  30.         url += "?" + paramName + "=" + paramValue;
  31.     else
  32.         url += "&" + paramName + "=" + paramValue;
  33.     }
  34.     window.location.href = url + hash;
  35. }
  36.   if (!window.location.href.match(/hl=ja/)) {
  37.     setGetParameter("hl", "ja")
  38.   }
  39. })();