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

<?php
/** Belarusian normative (Беларуская мова)
  *
  * This is still the version from Be-x-old, only duplicated for consistency of
  * plural and grammar functions. If there are errors please send a patch.
  *
  * @ingroup Language
  *
  * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
  * @bug 1638, 2135
  * @link http://be.wikipedia.org/wiki/Talk:LanguageBe.php
  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
  * @license http://www.gnu.org/copyleft/fdl.html GNU Free Documentation License
  */

class LanguageBe extends Language {

	function convertPlural( $count, $forms ) {
		if ( !count($forms) ) { return ''; }
		$forms = $this->preConvertPlural( $forms, 3 );

		if ($count > 10 && floor(($count % 100) / 10) == 1) {
			return $forms[2];
		} else {
			switch ($count % 10) {
				case 1:  return $forms[0];
				case 2:
				case 3:
				case 4:  return $forms[1];
				default: return $forms[2];
			}
		}
	}
}