wiki.techinc.nl/languages/classes/LanguageGv.php

<?php

/** Manx (Gaelg)
 *
 * @ingroup Language
 *
 * @author Niklas Laxström
 */
class LanguageGv extends Language {

	/**
	 * @param $count int
	 * @param $forms array
	 * @return string
	 */
	function convertPlural( $count, $forms ) {
		if ( !count( $forms ) ) { return ''; }

		$forms = $this->preConvertPlural( $forms, 4 );

		if ( $count > 0 && ( $count % 20 ) === 0 ) {
			return $forms[0];
		} else {
			switch ( $count % 10 ) {
				case 1: return $forms[1];
				case 2: return $forms[2];
				default: return $forms[3];
			}
		}
	}

}