public function getBrowserAcceptLanguages(Request $request)
    {
        $browserLanguages = [];

        if (strlen($request->server->get('HTTP_ACCEPT_LANGUAGE')) == 0) {
            return [];
        }

        $languages = $this->splitHttpAcceptHeader(
            $request->server->get('HTTP_ACCEPT_LANGUAGE')
        );
        foreach ($languages as $lang) {
            if (strstr($lang, '-')) {
                $codes = explode('-', $lang);
                if ($codes[0] == 'i') {
                    // Language not listed in ISO 639 that are not variants
                    // of any listed language, which can be registered with the
                    // i-prefix, such as i-cherokee
                    if (count($codes) > 1) {
                        $lang = $codes[1];
                    }
                } else {
                    for ($i = 0, $max = count($codes); $i < $max; ++$i) {
                        if ($i == 0) {
                            $lang = strtolower($codes[0]);
                        } else {
                            $lang .= '_'.strtoupper($codes[$i]);
                        }
                    }
                }
            }

            $browserLanguages[] = $lang;
        }

        return $browserLanguages;
    }