diff --git a/lang/en_utf8/error.php b/lang/en_utf8/error.php
index e870038bd26..731ab15919b 100644
--- a/lang/en_utf8/error.php
+++ b/lang/en_utf8/error.php
@@ -48,7 +48,10 @@ $string['groupnotaddederror'] = 'Group \"$a\" not added';
 $string['groupunknown'] = 'Group $a not associated to specified course';
 $string['guestnoeditprofile'] = 'The guest user cannot edit their profile';
 $string['guestnoeditprofileother'] = 'The guest user profile cannot be edited';
+$string['invalidcontext'] = 'Invalid context';
 $string['invalidcourse'] = 'Invalid course';
+$string['invalidcourseid'] = 'You are trying to use an invalid course ID ($a)';
+$string['invalidcoursemodule'] = 'Invalid course module ID';
 $string['invalidfieldname'] = '\"$a\" is not a valid field name';
 $string['invalidfiletype'] = '\"$a\" is not a valid file type';
 $string['invalidipformat'] = 'Invalid IP address format';