diff --git a/wp-includes/class-wp-locale-switcher.php b/wp-includes/class-wp-locale-switcher.php
index b3e163014a..9f1c4831ed 100644
--- a/wp-includes/class-wp-locale-switcher.php
+++ b/wp-includes/class-wp-locale-switcher.php
@@ -283,7 +283,7 @@ class WP_Locale_Switcher {
 
 		$wp_locale = new WP_Locale();
 
-		WP_Translation_Controller::instance()->set_locale( $locale );
+		WP_Translation_Controller::get_instance()->set_locale( $locale );
 
 		/**
 		 * Fires when the locale is switched to or restored.
diff --git a/wp-includes/l10n.php b/wp-includes/l10n.php
index 632f432f62..228c40757c 100644
--- a/wp-includes/l10n.php
+++ b/wp-includes/l10n.php
@@ -797,7 +797,7 @@ function load_textdomain( $domain, $mofile, $locale = null ) {
 		$locale = determine_locale();
 	}
 
-	$i18n_controller = WP_Translation_Controller::instance();
+	$i18n_controller = WP_Translation_Controller::get_instance();
 
 	// Ensures the correct locale is set as the current one, in case it was filtered.
 	$i18n_controller->set_locale( $locale );
@@ -911,7 +911,7 @@ function unload_textdomain( $domain, $reloadable = false ) {
 
 	// Since multiple locales are supported, reloadable text domains don't actually need to be unloaded.
 	if ( ! $reloadable ) {
-		WP_Translation_Controller::instance()->unload_textdomain( $domain );
+		WP_Translation_Controller::get_instance()->unload_textdomain( $domain );
 	}
 
 	if ( isset( $l10n[ $domain ] ) ) {
diff --git a/wp-includes/l10n/class-wp-translation-controller.php b/wp-includes/l10n/class-wp-translation-controller.php
index 616dce5793..b44384c013 100644
--- a/wp-includes/l10n/class-wp-translation-controller.php
+++ b/wp-includes/l10n/class-wp-translation-controller.php
@@ -42,20 +42,28 @@ final class WP_Translation_Controller {
 	protected $loaded_files = array();
 
 	/**
-	 * Returns the WP_Translation_Controller singleton.
+	 * Container for the main instance of the class.
+	 *
+	 * @since 6.5.0
+	 * @var WP_Translation_Controller|null
+	 */
+	private static $instance = null;
+
+	/**
+	 * Utility method to retrieve the main instance of the class.
+	 *
+	 * The instance will be created if it does not exist yet.
 	 *
 	 * @since 6.5.0
 	 *
 	 * @return WP_Translation_Controller
 	 */
-	public static function instance(): WP_Translation_Controller {
-		static $instance;
-
-		if ( ! $instance ) {
-			$instance = new self();
+	public static function get_instance(): WP_Translation_Controller {
+		if ( null === self::$instance ) {
+			self::$instance = new self();
 		}
 
-		return $instance;
+		return self::$instance;
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index fdd3acfd2e..35be8eec63 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.5-alpha-57349';
+$wp_version = '6.5-alpha-57350';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
diff --git a/wp-settings.php b/wp-settings.php
index 28bcdded99..e30eeb493b 100644
--- a/wp-settings.php
+++ b/wp-settings.php
@@ -622,7 +622,7 @@ $GLOBALS['wp_locale'] = new WP_Locale();
 $GLOBALS['wp_locale_switcher'] = new WP_Locale_Switcher();
 $GLOBALS['wp_locale_switcher']->init();
 
-WP_Translation_Controller::instance()->set_locale( $locale );
+WP_Translation_Controller::get_instance()->set_locale( $locale );
 
 // Load the functions for the active theme, for both parent and child theme if applicable.
 foreach ( wp_get_active_and_valid_themes() as $theme ) {