/**
* Translate a sentence
*
* @param string $sentence
* @param array $placeholders (optional)
* @param string|null $lang (optional)
*
* @return string
*/
public function translate($sentence, $placeholders = array(), $lang = null)
{
if ($lang === null) {
$lang = $this->language;
}
if (!isset($this->translations[$lang])) {
$this->translations[$lang] = $this->app->translations()->read($lang, array());
}
$translation =& $this->translations[$lang];
if (isset($translation[$sentence])) {
$sentence = $translation[$sentence];
}
return $this->placeholder->replace($sentence, $placeholders);
}