diff --git a/lang/en/calendar.php b/lang/en/calendar.php
index 5aef41c761b..b9bcdf0f453 100644
--- a/lang/en/calendar.php
+++ b/lang/en/calendar.php
@@ -63,11 +63,11 @@ $string['eventnone'] = 'No events';
 $string['eventrepeat'] = 'Repeats';
 $string['eventsall'] = 'All events';
 $string['eventsfor'] = '{$a} events';
-$string['eventskey'] = 'Events Key';
+$string['eventskey'] = 'Events key';
 $string['eventsrelatedtocourses'] = 'Events related to courses';
 $string['eventstarttime'] = 'Start time';
 $string['eventtime'] = 'Time';
-$string['eventview'] = 'Event Details';
+$string['eventview'] = 'Event details';
 $string['expired'] = 'Expired';
 $string['explain_site_timeformat'] = 'You can choose to see times in either 12 or 24 hour format for the whole site. If you choose "default", then the format will be automatically chosen according to the language you use in the site. This setting can be overridden by user preferences.';
 $string['export'] = 'Export';
diff --git a/lang/en/completion.php b/lang/en/completion.php
index 1d703462bc1..0d8867562e7 100644
--- a/lang/en/completion.php
+++ b/lang/en/completion.php
@@ -105,7 +105,7 @@ $string['criteriagroup']='Criteria group';
 $string['criteriarequiredall']='All criteria below are required';
 $string['criteriarequiredany']='Any criteria below are required';
 $string['days']='Days';
-$string['editcoursecompletionsettings']='Edit Course Completion Settings';
+$string['editcoursecompletionsettings']='Edit course completion settings';
 $string['enrolmentduration']='Days left';
 $string['err_nocourses']='Course completion is not enabled for any other courses, so none can be displayed. You can enable course completion in the course settings.';
 $string['err_nograde']='A course pass grade has not been set for this course. To enable this criteria type you must create a pass grade for this course.';
@@ -134,7 +134,7 @@ $string['progresstrackedroles']='Progress-tracked roles';
 $string['recognitionofpriorlearning']='Recognition of prior learning';
 $string['remainingenroledfortime']='Remaining enrolled for a specified period of time';
 $string['remainingenroleduntildate']='Remaining enrolled until a specified date';
-$string['requiredcriteria']='Required Criteria';
+$string['requiredcriteria']='Required criteria';
 $string['seedetails']='See details';
 $string['self']='Self';
 $string['selfcompletion']='Self completion';
diff --git a/lang/en/debug.php b/lang/en/debug.php
index 3d2f30ae3cc..f951261939d 100644
--- a/lang/en/debug.php
+++ b/lang/en/debug.php
@@ -48,7 +48,7 @@ $string['nocate'] = 'No categories!';
 $string['nomodules'] = 'No modules found!!';
 $string['nopageclass'] = 'Imported {$a} but found no page classes';
 $string['noreports'] = 'No reports accessible';
-$string['notables'] = 'No Tables!';
+$string['notables'] = 'No tables!';
 $string['phpvaroff'] = 'The PHP server variable \'{$a->name}\' should be Off - {$a->link}';
 $string['phpvaron'] = 'The PHP server variable \'{$a->name}\' is not turned On - {$a->link}';
 $string['sessionmissing'] = '{$a} object missing from session';