How can I change the language of Google Maps on the run?

I wan't to reverse geocode and get the address in two languages arabic and english so I want to get it in one language then change the language of the API and 开发者_开发技巧get the address in the other language, as I can't find a parameter to send to geocoder to determine the language. Any suggestions?

A language can be selected when you load the API by appending language=XX to the API URL where XX is the two-character language code (en for English, ar for Arabic, etc.) to the URL in the API call. See http://code.google.com/apis/maps/documentation/javascript/basics.html#Localization for documentation.

This won't let you change it on the fly, and I don't think you can do that. You can try loading the API a second time after getting the initial info you need in one language. But that seems likely to cause problems.

A cleaner way to do it might be to create a separate page that acts as a sort of web service for you. It accepts two parameters: A language code and an address. It loads the API using the language code requested, and reverse geocodes the address, providing the result. Your page would call this web service-like thing twice, once for each language, and then use the results as desired.

I created a function to change the language of Google Maps on the run.
Since it returns a Promise, you can easily wait until the API has loaded to execute some other code.

Demo

Example of use

setAPILanguage('fr', ['places'], 'xxxxxx').then(() => {
    //The API is loaded here
});

Documentation

/**
 * Changes the language of the Google Maps API
 * @param {String}   lang      - Google Maps new language
 * @param {String[]} libraries - The list of libraries needed
 * @param {String}   key       - Your API key
 * @returns {Promise}          - Resolves when Google Maps API has finished loading
 */

Source

const setAPILanguage = (lang, libraries, key) => {
  //Destroy old API
  document.querySelectorAll('script[src^="https://maps.googleapis.com"]').forEach(script => {
    script.remove();
  });
  if(google) delete google.maps;

  //Generate new Google Maps API script
  let newAPI = document.createElement('script');
  newAPI.src = 'https://maps.googleapis.com/maps/api/js?libraries=' + libraries.join(',') + '&key=' + key + '&language=' + lang + '&callback=googleMapsAPILoaded';

  //Callback for the Google Maps API src
  window.googleMapsAPILoaded = () => {
    let event = new CustomEvent('googleMapsAPILoaded');
    window.dispatchEvent(event);
  }

  //Wait for the callback to be executed
  let apiLoaded = new Promise(resolve => {
    window.addEventListener('googleMapsAPILoaded', () => {
      resolve();
    });
  });

  //Start the script
  document.querySelector('head').appendChild(newAPI);

  return apiLoaded;
}

Demo

As already pointed out this can't be changed once the map is loaded, but, for those who can afford a page refresh, this could work:

HTML

<script type="text/javascript">
    //load map based on current lang
    var scriptTag = document.createElement('script');

    var currentLang = window.localStorage && window.localStorage.getItem('language');
    var scriptSrc = '//maps.googleapis.com/maps/api/js?libraries=drawing,places&key=YOUR_KEY_HERE';
    if (currentLang)
        scriptSrc = '//maps.googleapis.com/maps/api/js?language=' + currentLang + '&libraries=drawing,places&key=YOUR_KEY_HERE';

    scriptTag.setAttribute('src', scriptSrc);
    scriptTag.setAttribute('async', '');
    document.head.appendChild(scriptTag);
</script>

JS

function changeLangAndReload(lang) {
    window.localStorage.setItem('language', lang);
    window.location.reload();//or use your preferred way to refresh 
}

The following example displays a map in Japanese and sets the region to Japan:

<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&language=ja&region=JP">
</script>

Source