diff --git a/install/lang/ar/langconfig.php b/install/lang/ar/langconfig.php
index 3ae9a6da409..ff4f645c313 100644
--- a/install/lang/ar/langconfig.php
+++ b/install/lang/ar/langconfig.php
@@ -29,5 +29,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['parentlanguage'] = '';
 $string['thisdirection'] = 'rtl';
 $string['thislanguage'] = 'العربية';
diff --git a/install/lang/en_us_k12/langconfig.php b/install/lang/en_us_k12/langconfig.php
index 87e0429d83a..f37a63bc990 100644
--- a/install/lang/en_us_k12/langconfig.php
+++ b/install/lang/en_us_k12/langconfig.php
@@ -29,5 +29,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['parentlanguage'] = 'en_us';
 $string['thisdirection'] = 'ltr';
-$string['thislanguage'] = 'American English K12';
+$string['thislanguage'] = 'English (United States) K12';
diff --git a/install/lang/he/langconfig.php b/install/lang/he/langconfig.php
index c7b3cc6da4d..9d06728367a 100644
--- a/install/lang/he/langconfig.php
+++ b/install/lang/he/langconfig.php
@@ -29,5 +29,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
+$string['parentlanguage'] = 'he';
 $string['thisdirection'] = 'rtl';
 $string['thislanguage'] = 'עברית';
diff --git a/install/lang/id/admin.php b/install/lang/id/admin.php
index 7c147aee80f..a888f1f0561 100644
--- a/install/lang/id/admin.php
+++ b/install/lang/id/admin.php
@@ -39,3 +39,4 @@ $string['cliunknowoption'] = 'Opsi tidak dikenali :
  {$a}
 Silahkan gunakan opsi --help';
 $string['cliyesnoprompt'] = 'ketik y (Ya) atau t (Tidak)';
+$string['environmentrequireinstall'] = 'harus dipasang dan diaktifkan';