diff --git a/wp-includes/l10n.php b/wp-includes/l10n.php
index d1afbe4832..def655b414 100644
--- a/wp-includes/l10n.php
+++ b/wp-includes/l10n.php
@@ -889,7 +889,7 @@ function load_script_textdomain( $handle, $domain, $path = null ) {
 	global $wp_scripts;
 
 	$path   = untrailingslashit( $path );
-	$locale = is_admin() ? get_locale() : get_user_locale();
+	$locale = determine_locale();
 
 	// If a path was given and the handle file exists simply return it.
 	$file_base       = $domain === 'default' ? $locale : $domain . '-' . $locale;
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3ad000a1bd..df99baa9d5 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-RC2-43958';
+$wp_version = '5.0-RC2-43959';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.