diff --git a/admin/tool/policy/lang/en/tool_policy.php b/admin/tool/policy/lang/en/tool_policy.php
index 001758fd947..da07731192c 100644
--- a/admin/tool/policy/lang/en/tool_policy.php
+++ b/admin/tool/policy/lang/en/tool_policy.php
@@ -42,7 +42,7 @@ $string['activate'] = 'Set status to "Active"';
 $string['activating'] = 'Activating a policy';
 $string['activateconfirm'] = '<p>You are about to activate policy <em>\'{$a->name}\'</em> and make the version <em>\'{$a->revision}\'</em> the current one.</p><p>All users will be required to agree to this new policy version to be able to use the site.</p>';
 $string['activateconfirmyes'] = 'Activate';
-$string['agreepolicies'] = 'Please agree to the following policies';
+$string['agreepolicies'] = 'Please agree to the following policies:';
 $string['backtoprevious'] = 'Go back to previous page';
 $string['backtotop'] = 'Back to top';
 $string['cachedef_policy_optional'] = 'Cache of the optional/compulsory flag for policy versions';
@@ -74,8 +74,8 @@ $string['filterplaceholder'] = 'Search keyword or select filter';
 $string['filterpolicy'] = 'Policy: {$a}';
 $string['guestconsent:continue'] = 'Continue';
 $string['guestconsentmessage'] = 'If you continue browsing this website, you agree to our policies:';
-$string['iagree'] = 'I agree to the {$a}';
-$string['idontagree'] = 'No thanks, I decline {$a}';
+$string['iagree'] = 'I agree to the {$a}.';
+$string['idontagree'] = 'I don\'t agree to the {$a}.';
 $string['iagreetothepolicy'] = 'Give consent';
 $string['inactivate'] = 'Set status to "Inactive"';
 $string['inactivating'] = 'Inactivating a policy';
@@ -94,9 +94,9 @@ $string['newpolicy'] = 'New policy';
 $string['newversion'] = 'New version';
 $string['noactivepolicies'] = 'There are no policies with an active version.';
 $string['nofiltersapplied'] = 'No filters applied';
-$string['nopermissiontoagreedocs'] = 'No permission to agree to the policies';
+$string['nopermissiontoagreedocs'] = 'No permission to agree to the policies.';
 $string['nopermissiontoagreedocs_desc'] = 'Sorry, you do not have the required permissions to agree to the policies.<br />You will not be able to use this site until the following policies are agreed:';
-$string['nopermissiontoagreedocsbehalf'] = 'No permission to agree to the policies on behalf of this user';
+$string['nopermissiontoagreedocsbehalf'] = 'No permission to agree to the policies on behalf of this user.';
 $string['nopermissiontoagreedocsbehalf_desc'] = 'Sorry, you do not have the required permission to agree to the following policies on behalf of {$a}:';
 $string['nopermissiontoagreedocscontact'] = 'For more help:';
 $string['nopermissiontoviewpolicyversion'] = 'You do not have permissions to view this policy version.';
diff --git a/lang/en/admin.php b/lang/en/admin.php
index af8a396845c..c8ec864d957 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -1152,7 +1152,7 @@ $string['requiremodintro_desc'] = 'If enabled, users will be forced to enter a d
 $string['required'] = 'Required';
 $string['requires'] = 'Requires';
 $string['purgecaches'] = 'Purge all caches';
-$string['purgecachesconfirm'] = 'Moodle can cache themes, javascript, language strings, filtered text, rss feeds and many other pieces of calculated data.  Purging these caches will delete that data from the server and force browsers to refetch data, so that you can be sure you are seeing the most up-to-date values produced by the current code.  There is no danger in purging caches, but your site may appear slower for a while until the server and clients calculate new information and cache it.';
+$string['purgecachesconfirm'] = 'Moodle can cache themes, JavaScript, language strings, filtered text, RSS feeds and other pieces of calculated data. Purging caches will delete data from the server and force browsers to re-fetch data, so you can be sure you are seeing the most up-to-date values produced by the current code. There is no danger in purging caches, but your site may appear slower for a while until the server and clients calculate new information and cache it.';
 $string['purgecachesfinished'] = 'All caches were purged.';
 $string['purgecachesnoneselected'] = 'Select one or more caches to purge';
 $string['purgecachespage'] = 'Purge caches';
diff --git a/lang/en/moodle.php b/lang/en/moodle.php
index 8dc0a7d9bb7..981d9b5092a 100644
--- a/lang/en/moodle.php
+++ b/lang/en/moodle.php
@@ -192,7 +192,7 @@ $string['backupdaterecordtype'] = '<br />{$a->recordtype} - {$a->recordname}<br
 $string['backupdetails'] = 'Backup details';
 $string['backuperrorinvaliddestination'] = 'The backup destination folder does not exist or is not writable.';
 $string['backupexecuteathelp'] = 'Choose what time automated backups should run at.';
-$string['backupfailed'] = 'Some of your courses weren\'t saved!!';
+$string['backupfailed'] = 'Some of your courses weren\'t saved.';
 $string['backupfilename'] = 'backup';
 $string['backupfinished'] = 'Backup completed successfully';
 $string['backupfromthissite'] = 'Backup was made on this site?';
@@ -347,7 +347,7 @@ $string['courseadministration'] = 'Course administration';
 $string['courseapprovedemail'] = 'Your requested course is approved, <a href="{$a->url}">{$a->name}</a>, and you are a {$a->teacher}.';
 $string['courseapprovedemail2'] = 'Your requested course is approved: <a href="{$a->url}">{$a->name}</a>.';
 $string['courseapprovedfailed'] = 'Failed to save the course as approved!';
-$string['courseapprovedsubject'] = 'Your course has been approved!';
+$string['courseapprovedsubject'] = 'Your course has been approved.';
 $string['courseavailable'] = 'This course is available to students';
 $string['courseavailablenot'] = 'This course is not available to students';
 $string['coursebackup'] = 'Course backup';
@@ -535,7 +535,7 @@ $string['deletecoursecheck'] = 'Are you absolutely sure you want to completely d
 $string['deleted'] = 'Deleted';
 $string['deletedactivity'] = 'Deleted {$a}';
 $string['deletedcourse'] = '{$a} has been completely deleted';
-$string['deletednot'] = 'Could not delete {$a} !';
+$string['deletednot'] = 'Could not delete {$a}.';
 $string['deletecheck'] = 'Delete {$a} ?';
 $string['deletechecktype'] = 'Are you sure that you want to delete this {$a->type}?';
 $string['deletechecktypename'] = 'Are you sure that you want to delete the {$a->type} "{$a->name}"?';
@@ -1189,7 +1189,7 @@ $string['labelvalue'] = '{$a->label}: {$a->value}';
 $string['langltr'] = 'Language direction left-to-right';
 $string['langrtl'] = 'Language direction right-to-left';
 $string['language'] = 'Language';
-$string['languagegood'] = 'This language pack is up-to-date! :-)';
+$string['languagegood'] = 'This language pack is up-to-date.';
 $string['languageselector'] = 'Language selector';
 $string['last'] = 'Last';
 $string['lastaccess'] = 'Last access';
@@ -1667,13 +1667,13 @@ $string['passwordsdiffer'] = 'These passwords do not match';
 $string['passwordset'] = 'Your password has been set.';
 $string['path'] = 'Path';
 $string['pathnotexists'] = 'Path doesn\'t exist in your server!';
-$string['pathslasherror'] = 'Path can\'t end with a slash!!';
-$string['paymentinstant'] = 'Use the button below to pay and be enrolled within minutes!';
+$string['pathslasherror'] = 'The path can\'t end with a slash.';
+$string['paymentinstant'] = 'Use the button below to pay and be enrolled within minutes.';
 $string['paymentpending'] = '(<small><b><u>{$a}</u></b> pending</small>)';
 $string['paymentrequired'] = 'This course requires a payment for entry.';
 $string['payments'] = 'Payments';
-$string['paymentsorry'] = 'Thank you for your payment!  Unfortunately your payment has not yet been fully processed, and you are not yet registered to enter the course "{$a->fullname}".  Please try continuing to the course in a few seconds, but if you continue to have trouble then please alert the {$a->teacher} or the site administrator';
-$string['paymentthanks'] = 'Thank you for your payment!  You are now enrolled in your course:<br />"{$a}"';
+$string['paymentsorry'] = 'Thanks for your payment. When it is processed, you will be able to enter the course {$a->fullname}.  Please wait then try again. If you continue to have trouble, contact the {$a->teacher} or the site administrator.';
+$string['paymentthanks'] = 'Thanks for your payment. You are now enrolled in the course {$a}.';
 $string['pendingrequests'] = 'Pending requests';
 $string['percents'] = '{$a}%';
 $string['periodending'] = 'Period ending ({$a})';
diff --git a/mod/assign/lang/en/assign.php b/mod/assign/lang/en/assign.php
index df5a244b761..496f8b87522 100644
--- a/mod/assign/lang/en/assign.php
+++ b/mod/assign/lang/en/assign.php
@@ -38,7 +38,7 @@ $string['addnewgroupoverride'] = 'Add group override';
 $string['addnewuseroverride'] = 'Add user override';
 $string['addsubmission'] = 'Add submission';
 $string['addsubmission_help'] = 'You have not made a submission yet.';
-$string['allocatedmarker'] = 'Allocated Marker';
+$string['allocatedmarker'] = 'Allocated marker';
 $string['allocatedmarker_help'] = 'Marker allocated to this submission.';
 $string['allowsubmissions'] = 'Allow the user to continue making submissions to this assignment.';
 $string['allowsubmissionsshort'] = 'Allow submission changes';
@@ -544,7 +544,7 @@ assignment submission for \'<i>{$a->assignment}</i>\'.</p>
 <p>You can see the status of your <a href="{$a->url}">assignment submission</a>.</p>';
 $string['submissioncopiedsmall'] = 'You have copied your previous assignment submission for {$a->assignment}';
 $string['submissiondrafts'] = 'Require students to click the submit button';
-$string['submissiondrafts_help'] = 'If enabled, students will have to click a submit button to declare their submission as final. This allows students to keep a draft version of the submission on the system. If this setting is changed from "No" to "Yes" after students have already submitted, those submissions will be regarded as final.';
+$string['submissiondrafts_help'] = 'Should students have a submit button to indicate when they have finished making changes to their submission and it is ready for grading?';
 $string['submissioneditable'] = 'Student can edit this submission';
 $string['submissionlog'] = 'Student: {$a->fullname}, Status: {$a->status}';
 $string['submissionnotcopiedinvalidstatus'] = 'The submission was not copied because it has been edited since it was reopened.';
diff --git a/question/bank/managecategories/lang/en/qbank_managecategories.php b/question/bank/managecategories/lang/en/qbank_managecategories.php
index fe1e1856665..7a461340c5f 100644
--- a/question/bank/managecategories/lang/en/qbank_managecategories.php
+++ b/question/bank/managecategories/lang/en/qbank_managecategories.php
@@ -26,5 +26,5 @@
 $string['error:category'] = 'You must select a valid category';
 $string['pluginname'] = 'Manage categories';
 $string['privacy:preference:includesubcategories_filter_default'] = 'Indicates whether or not the "Also show questions from subcategories" filter option is enabled by default when the user views the question bank.';
-$string['questionsubcategoriesdisplayed'] = 'When selecting categories in the question bank, the "Also show questions from subcategories" option is used and are automatically included in the filter results.';
+$string['questionsubcategoriesdisplayed'] = 'When selecting categories in the question bank, the "Also show questions from subcategories" option is used, so questions from subcategories are included in the filter results.';
 $string['questionsubcategoriesnotdisplayed'] = 'When selecting categories in the question bank, the "Also show questions from subcategories" option is not used, so questions from subcategories are not included in the filter results.';
diff --git a/theme/boost/lang/en/theme_boost.php b/theme/boost/lang/en/theme_boost.php
index 44659b5bbd9..97b827640da 100644
--- a/theme/boost/lang/en/theme_boost.php
+++ b/theme/boost/lang/en/theme_boost.php
@@ -39,7 +39,7 @@ $string['loginbackgroundimage_desc'] = 'The image to display as a background for
 $string['nobootswatch'] = 'None';
 $string['pluginname'] = 'Boost';
 $string['presetfiles'] = 'Additional theme preset files';
-$string['presetfiles_desc'] = 'Preset files can be used to dramatically alter the appearance of the theme. See <a href="https://docs.moodle.org/dev/Boost_Presets">Boost presets</a> for information on creating and sharing your own preset files, and see the <a href="https://moodle.net/search?q=boost+presets">Presets repository</a> for presets that others have shared.';
+$string['presetfiles_desc'] = 'Preset files can be used to dramatically alter the appearance of a theme.';
 $string['preset'] = 'Theme preset';
 $string['preset_desc'] = 'Pick a preset to broadly change the look of the theme.';
 $string['privacy:metadata'] = 'The Boost theme does not store any personal data about any user.';
diff --git a/theme/classic/lang/en/theme_classic.php b/theme/classic/lang/en/theme_classic.php
index 5f926ce7e21..2ed2627014b 100644
--- a/theme/classic/lang/en/theme_classic.php
+++ b/theme/classic/lang/en/theme_classic.php
@@ -32,7 +32,7 @@ $string['navbardark'] = 'Use a dark style navbar';
 $string['navbardarkdesc'] = 'Swaps text and background colours for the navbar at the top of the page between dark and light.';
 $string['pluginname'] = 'Classic';
 $string['presetfiles'] = 'Additional theme preset files';
-$string['presetfiles_desc'] = 'Preset files can be used to dramatically alter the appearance of the theme. See <a href="https://docs.moodle.org/dev/Boost_Presets">Boost presets</a> for information on creating and sharing your own preset files, and see the <a href="https://moodle.net/search?q=boost+presets">Presets repository</a> for presets that others have shared.';
+$string['presetfiles_desc'] = 'Preset files can be used to dramatically alter the appearance of a theme.';
 $string['preset'] = 'Theme preset';
 $string['preset_desc'] = 'Pick a preset to broadly change the look of the theme.';
 $string['privacy:metadata'] = 'The Classic theme does not store any personal data.';