diff --git a/lang/en_utf8/glossary.php b/lang/en_utf8/glossary.php
index 5ff52caf215..e569803b2d0 100644
--- a/lang/en_utf8/glossary.php
+++ b/lang/en_utf8/glossary.php
@@ -144,8 +144,6 @@ $string['importedentries'] = 'Imported entries';
 $string['importentries'] = 'Import entries';
 $string['importentriesfromxml'] = 'Import entries from XML file';
 $string['includegroupbreaks'] = 'Include group breaks';
-$string['invalidid'] = 'Incorrect glossary id';
-$string['invalidglossaryformat'] = 'Invalid Glossary Format';
 $string['invalidrate'] = 'Invalid glossary rate ($a)';
 $string['isglobal'] = 'Is this glossary global?';
 $string['letter'] = 'letter';