diff --git a/library/Icinga/Util/Translator.php b/library/Icinga/Util/Translator.php
index 8d6e60e19..c2aeccddd 100644
--- a/library/Icinga/Util/Translator.php
+++ b/library/Icinga/Util/Translator.php
@@ -133,10 +133,19 @@ class Translator
         $codes = array();
 
         foreach (array_values(self::$knownDomains) as $directory) {
-            $dh = opendir($directory);
+            if ($directory[0] === '.') continue;
+
+            $dir = realpath($directory);
+            if (!is_dir($dir)) {
+                $dir = realpath($dir . '/LC_MESSAGES');
+                if (!is_dir($dir)) continue;
+            }
+            $dh = opendir($dir);
             while (false !== ($name = readdir($dh))) {
-                if (!preg_match('@\.|\.\.@', $name) && is_dir($directory . DIRECTORY_SEPARATOR . $name)) {
-                    $codes[] = $name;
+                if (substr($name, 0, 1) === '.') continue;
+                if ($name === 'LC_MESSAGES') continue;
+                if (is_dir($dir . DIRECTORY_SEPARATOR . $name)) {
+                    $codes[] = substr($name, 0, strpos($name, '.'));
                 }
             }
         }