Redirects single post URLs to their correct language-specific category URLs

functions.php

<?php
add_action('template_redirect', function () {
	global $post, $wp_query;

	if (function_exists('wpml_get_language_information')) {
		$current_lang = apply_filters('wpml_current_language', null);

		if ($current_lang !== 'he') {
			return;
		}

		$current_url = untrailingslashit(home_url(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH)));
		$current_url = mb_strtolower(urldecode($current_url), 'UTF-8');

		if (is_single()) {
			$correct_url = untrailingslashit(get_permalink($post->ID));
			$correct_url = mb_strtolower(urldecode($correct_url), 'UTF-8');

			if ($current_url !== $correct_url || preg_match('/\/client_updates$/', $current_url)) {
				$wp_query->set_404();
				status_header(410);
				get_template_part('404');
				exit;
			}
		}

		if (is_tax()) {
			$term = get_queried_object();
			if ($term) {
				$correct_url = untrailingslashit(get_term_link($term));
				$correct_url = mb_strtolower(urldecode($correct_url), 'UTF-8');

				if ($current_url !== $correct_url || preg_match('/\/client_updates$/', $current_url)) {
					$wp_query->set_404();
					status_header(410);
					get_template_part('404');
					exit;
				}
			}
		}
	}
});
?>