render/rules/LanguageRules.php

		class LanguageRules {
		public static function get( string $lang ): array {
		- $file = __DIR__ . \strtolower( $lang ) . '.php';
		+ $file = __DIR__ . '/' . \strtolower( $lang ) . '.php';

		return \file_exists( $file ) ? require $file : [];

Reinstates slash