friendica-addons/buffer/lang/is/strings.php

<?php

if(! function_exists("string_plural_select_is")) {
function string_plural_select_is($n){
	$n = intval($n);
	return intval($n % 10 != 1 || $n % 100 == 11);
}}
$a->strings['Permission denied.'] = 'Heimild ekki veitt.';