apply_filters( ‘locale’, string $locale )

User Contributed Notes

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   surrealwebs 9 years ago

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   You can leverage this hook to force the language of your admin dashboard, however, you need to call it from a plugin and not from your theme, by the time WordPress gets to loading your theme it’s too late.

   <?php
   /*
   Plugin Name: English Only Admin
   Plugin URI: https://your-domain.com
   Description: Force English (en_US) in the WordPress Admin
   Version: 1.0
   Author: You
   Author URI: https://your-domain.com
   Text Domain: englishonlyadmin
   */
   // prevent direct access
   if ( ! defined( 'WPINC' ) ) {
       die;
   }
   if ( ! function_exists( 'uniquePrefix_force_english_only_admin' ) ) {
       /**
        * Override locale for admin to force English (en_US).
        *
        * @param string $locale Current locale.
        *
        * @return string English (en_US) locale if in Admin, configured locale otherwise.
        */
       function uniquePrefix_force_english_only_admin( $locale ) {
           // detect when we are in the admin dashboard and force english
           if ( is_admin() ) {
               $locale = 'en_US';
           }
           return $locale;
       }
       add_filter( 'locale', 'uniquePrefix_force_english_only_admin', 1, 1 );
   }
2. Skip to note 4 content

   Steven Lin 5 years ago

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   Example migrated from Codex:

   An example of changing the locale language based on the $_GET parameter of the URL.

   <?php
   add_filter( 'locale', 'set_my_locale' );
   
   function set_my_locale( $lang ) {
      if ( 'gl' == $_GET['language'] ) {
         // set to Greenlandic
         return 'ka_GL';
      } else {
         // return original language
         return $lang;
      }
   }
   ?>