function check_progress(FuelDocs $docs_en, FuelDocs $docs_ja)
{
$rates = array();
foreach ($docs_en as $file => $val) {
$content_en = $docs_en->getContents($file);
$content_ja = $docs_ja->getContents($file);
$rate = FuelDocs::calcProgress($content_en, $content_ja);
echo $file, "\t", sprintf("%d", $rate), PHP_EOL;
$rates[] = $rate;
//if ($file === 'general/constants.html') exit;
}
echo PHP_EOL, 'average: ', array_sum($rates) / count($rates), PHP_EOL;
}