How can I modify labels in default wordpress registration form? [duplicate]

If you are using default WordPress registration form. But there are no “Email” field. OK but you can try below code.

if ($pagenow=='wp-login.php') { 
   add_filter( 'gettext', 'user_email_login_text', 20, 3 );
      function user_email_login_text( $translated_text, $text, $domain ){
          if ($translated_text == 'Email') {
               $translated_text="Email required field";
          }

          return $translated_text;
     }
}