diff --git a/include/lang.inc.php b/include/lang.inc.php
index b7d7c93b..6f13822e 100644
--- a/include/lang.inc.php
+++ b/include/lang.inc.php
@@ -11,8 +11,13 @@ if (!defined('serendipity_LANG_LOADED') || serendipity_LANG_LOADED !== true) {
 
     // The following variable can be set in serendipity_config_local.inc.php to force your templates being able to use language override includes
     if ($serendipity['useTemplateLanguage']) {
-        @include (S9Y_INCLUDE_PATH . 'templates/' . $serendipity['template'] . '/' . $charset .  'lang_' . $serendipity['lang'] . '.inc.php');
-        @include (S9Y_INCLUDE_PATH . 'templates/' . $serendipity['template'] . '/lang_en.inc.php');
+        if (defined('S9Y_DATA_PATH')) {
+            @include (S9Y_DATA_PATH . 'templates/' . $serendipity['template'] . '/' . $charset .  'lang_' . $serendipity['lang'] . '.inc.php');
+            @include (S9Y_DATA_PATH . 'templates/' . $serendipity['template'] . '/lang_en.inc.php');
+        } else {
+            @include (S9Y_INCLUDE_PATH . 'templates/' . $serendipity['template'] . '/' . $charset .  'lang_' . $serendipity['lang'] . '.inc.php');
+            @include (S9Y_INCLUDE_PATH . 'templates/' . $serendipity['template'] . '/lang_en.inc.php');
+        }
     }
 
     // Try and include preferred language from the configurated setting