Translations::translate_plural( string $singular, string $plural, int $count, string $context = null )

	function translate_plural($singular, $plural, $count, $context = null) {
		$entry = new Translation_Entry(array('singular' => $singular, 'plural' => $plural, 'context' => $context));
		$translated = $this->translate_entry($entry);
		$index = $this->select_plural_form($count);
		$total_plural_forms = $this->get_plural_forms_count();
		if ($translated && 0 <= $index && $index < $total_plural_forms &&
				is_array($translated->translations) &&
				isset($translated->translations[$index]))
			return $translated->translations[$index];
		else
			return 1 == $count? $singular : $plural;
	}