Facebook messenger plugin is changing language

This helped me. I changed URL in SDK code the js.src parameter from:

js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';

To:

js.src = 'https://connect.facebook.net/en/sdk/xfbml.customerchat.js';

Notice that in the first URL there is /en_US/ and in the second there is only /en/. Now I have Facebook chat in english. Still better than random foreign language. I'm following this thread for better solution.

My code:

  <!-- Load Facebook SDK for JavaScript -->
  <div id="fb-root"></div>
  <script>
    window.fbAsyncInit = function() {
      FB.init({
        xfbml            : true,
        version          : 'v4.0'
      });
    };

    (function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = 'https://connect.facebook.net/en/sdk/xfbml.customerchat.js';
    //js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
    fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));</script>


  <!-- Your customer chat code -->

  <div class="fb-customerchat"
    attribution=setup_tool
    page_id="{Your page id}"
    theme_color="{Your theme color}"
    logged_in_greeting="Hi! How can we help you?"
    logged_out_greeting="Hi! How can we help you?">
  </div>

Here is my solution

• Set up a new Chat plugin again, and choose English UK instead of default English us. It worked for me. check this image Click to View

Their latest Chat Plugin v14 is unstable, switch to an older version. I'm on v6 and there's no language issue.

<!-- Messenger Chat Plugin Code -->
<div id="fb-root"></div>

<!-- Your Chat Plugin code -->
<div id="fb-customer-chat" class="fb-customerchat">
</div>

<script>
    var chatbox = document.getElementById('fb-customer-chat');
    chatbox.setAttribute("page_id", "000000001");
    chatbox.setAttribute("attribution", "biz_inbox");
</script>

<!-- Your SDK code -->
<script>
    window.fbAsyncInit = function() {
    FB.init({
        xfbml            : true,
        version          : 'v6.0' // <----- Change version here
    });
    };

    (function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
    fjs.parentNode.insertBefore(js, fjs);
    }(document, 'script', 'facebook-jssdk'));
</script>

If the problem is still occurs, you can override the src like this, add ?locale=en_US or any language you like at the end of url

https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js?locale=en_US