How do I change the value of lang=en-US

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I have noticed that in the <html> tag on my WP site that the language is defined as US English. 

<html lang="en-US" prefix="og: http://ogp.me/ns#">

I would like to change it to British English en-GB but I’m not sure of the best way.

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I dug around and found language_attributes() in general-template.php which makes a call to get_bloginfo('language'). I could manually insert the value here but that doesn’t seem like the best way to do it.

What is the proper way to change this value?

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2 comments

  1. The value for that string is normally taken from the option WPLANG in your database table $prefix_options. You can set it in the backend under Settings/General (wp-admin/options-general.php) or per SQL.

    There several ways to change that value per PHP:

    1. Create a global variable $locale in your wp-config.php:

      $locale = 'en_GB';

    2. Declare the constant WPLANG in your wp-config.php:

      define( 'WPLANG', 'en_GB' );

      This has been deprecated, but it’ll still work.

    3. Filter locale:

      add_filter( 'locale', function() {
    return 'en_GB';
});

      This a very flexible way, because you can add more conditions to that function, for example check the current site ID in a multisite.

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