App\Http\Middleware\LangPreprocessor::handle PHP Метод

    public function handle(Request $request, Closure $next)
    {
        // check locale at request & set locale
        $locale = $request->get('_l');
        if (!$locale) {
            $locale = $request->cookie('locale', app('xe.translator')->getLocale());
        }
        app()->setLocale($locale);
        app('cookie')->queue(cookie()->forever('locale', $locale));
        app('router')->matched(function ($route, $request) use($locale) {
            $key = self::class . '://' . $request->method() . '/' . $route->getPath() . '/' . $locale;
            app('xe.translator')->setCurrentCacheKey($key);
        });
        if ($request->has('xe_use_request_preprocessor') && $this->available()) {
            $this->prepare($request);
        }
        /** @var Response $response */
        $response = $next($request);
        if ($request->has('xe_use_request_preprocessor') && $this->available()) {
            $this->conduct($request);
        }
        return $response;
    }