Ticket #36491: 36491-leaner-loading-en_US.patch

src/wp-includes/l10n.php

@@ -630 +630 @@
         // Unload previously loaded strings so we can switch translations.
         unload_textdomain( 'default' );
 
+        if ( 'en_US' === $locale ) {
+                return true;
+        }
+
         $return = load_textdomain( 'default', WP_LANG_DIR . "/$locale.mo" );
 
         if ( ( is_multisite() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) && ! file_exists(  WP_LANG_DIR . "/admin-$locale.mo" ) ) {
@@ -674 +678 @@
          */
         $locale = apply_filters( 'plugin_locale', $locale, $domain );
 
+        if ( 'en_US' === $locale ) {
+                return true;
+        }
+
         if ( false !== $plugin_rel_path ) {
                 $path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
         } elseif ( false !== $deprecated ) {
@@ -685 +693 @@
 
         // Load the textdomain according to the plugin first
         $mofile = $domain . '-' . $locale . '.mo';
-        if ( $loaded = load_textdomain( $domain, $path . '/'. $mofile ) )
+        if ( $loaded = load_textdomain( $domain, $path . '/'. $mofile ) ) {
                 return $loaded;
+        }
 
         // Otherwise, load from the languages directory
         $mofile = WP_LANG_DIR . '/plugins/' . $mofile;
@@ -706 +715 @@
 function load_muplugin_textdomain( $domain, $mu_plugin_rel_path = '' ) {
         /** This filter is documented in wp-includes/l10n.php */
         $locale = apply_filters( 'plugin_locale', get_locale(), $domain );
+
+        if ( 'en_US' === $locale ) {
+                return true;
+        }
+
         $path = trailingslashit( WPMU_PLUGIN_DIR . '/' . ltrim( $mu_plugin_rel_path, '/' ) );
 
         // Load the textdomain according to the plugin first
         $mofile = $domain . '-' . $locale . '.mo';
-        if ( $loaded = load_textdomain( $domain, $path . $mofile ) )
+        if ( $loaded = load_textdomain( $domain, $path . $mofile ) ) {
                 return $loaded;
+        }
 
         // Otherwise, load from the languages directory
         $mofile = WP_LANG_DIR . '/plugins/' . $mofile;
@@ -745 +760 @@
          */
         $locale = apply_filters( 'theme_locale', $locale, $domain );
 
-        if ( ! $path )
+        if ( 'en_US' === $locale ) {
+                return true;
+        }
+
+        if ( ! $path ) {
                 $path = get_template_directory();
+        }
 
         // Load the textdomain according to the theme
         $mofile = untrailingslashit( $path ) . "/{$locale}.mo";
-        if ( $loaded = load_textdomain( $domain, $mofile ) )
+        if ( $loaded = load_textdomain( $domain, $mofile ) ) {
                 return $loaded;
+        }
 
         // Otherwise, load from the languages directory
         $mofile = WP_LANG_DIR . "/themes/{$domain}-{$locale}.mo";