I18N: Switch locale to admin locale when sending auto update emails.

If sending an auto update email to the site administrator's email address, look up if a user with the same email exists and switch to that user's locale. If not, explicitly switches to the site locale.

This is a follow-up to [59128] where this was previously added for other types of emails.

Props benniledl, swissspidy.
Fixes #62496.

git-svn-id: https://develop.svn.wordpress.org/trunk@59460 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-automatic-updater.php

@@ -936,6 +936,14 @@ protected function send_email( $type, $core_update, $result = null ) {
 			return;
 		}
 
+		$admin_user = get_user_by( 'email', get_site_option( 'admin_email' ) );
+
+		if ( $admin_user ) {
+			$switched_locale = switch_to_user_locale( $admin_user->ID );
+		} else {
+			$switched_locale = switch_to_locale( get_locale() );
+		}
+
 		switch ( $type ) {
 			case 'success': // We updated.
 				/* translators: Site updated notification email subject. 1: Site title, 2: WordPress version. */
@@ -1139,8 +1147,11 @@ protected function send_email( $type, $core_update, $result = null ) {
 		$email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
 
 		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
-	}
 
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
+	}
 
 	/**
 	 * Checks whether an email should be sent after attempting plugin or theme updates.
@@ -1255,6 +1266,14 @@ protected function send_plugin_theme_email( $type, $successful_updates, $failed_
 			}
 		}
 
+		$admin_user = get_user_by( 'email', get_site_option( 'admin_email' ) );
+
+		if ( $admin_user ) {
+			$switched_locale = switch_to_user_locale( $admin_user->ID );
+		} else {
+			$switched_locale = switch_to_locale( get_locale() );
+		}
+
 		$body               = array();
 		$successful_plugins = ( ! empty( $successful_updates['plugin'] ) );
 		$successful_themes  = ( ! empty( $successful_updates['theme'] ) );
@@ -1526,6 +1545,10 @@ protected function send_plugin_theme_email( $type, $successful_updates, $failed_
 		if ( $result ) {
 			update_option( 'auto_plugin_theme_update_emails', $past_failure_emails );
 		}
+
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
 	}
 
 	/**
@@ -1534,9 +1557,12 @@ protected function send_plugin_theme_email( $type, $successful_updates, $failed_
 	 * @since 3.7.0
 	 */
 	protected function send_debug_email() {
-		$update_count = 0;
-		foreach ( $this->update_results as $type => $updates ) {
-			$update_count += count( $updates );
+		$admin_user = get_user_by( 'email', get_site_option( 'admin_email' ) );
+
+		if ( $admin_user ) {
+			$switched_locale = switch_to_user_locale( $admin_user->ID );
+		} else {
+			$switched_locale = switch_to_locale( get_locale() );
 		}
 
 		$body     = array();
@@ -1715,6 +1741,10 @@ protected function send_debug_email() {
 		$email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
 
 		wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
+
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
 	}
 
 	/**