diff --git a/install/lang/eo/langconfig.php b/install/lang/eo/langconfig.php
index bec35f767ba..50347138b2f 100644
--- a/install/lang/eo/langconfig.php
+++ b/install/lang/eo/langconfig.php
@@ -29,4 +29,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['parentlanguage'] = '';
+$string['thisdirection'] = 'ltr';
 $string['thislanguage'] = 'Esperanto';