diff --git a/admin/blocks.php b/admin/blocks.php
index 368299a8298..9a54e791a3a 100644
--- a/admin/blocks.php
+++ b/admin/blocks.php
@@ -188,10 +188,10 @@
 
         if ($blocks[$blockid]->visible) {
             $visible = '<a href="blocks.php?hide='.$blockid.'&amp;sesskey='.$USER->sesskey.'" title="'.$strhide.'">'.
-                       '<img src="'.$CFG->pixpath.'/i/hide.gif" height="16" width="16" alt="" /></a>';
+                       '<img src="'.$CFG->pixpath.'/i/hide.gif" height="16" width="16" alt="'.$strhide.'" /></a>';
         } else {
             $visible = '<a href="blocks.php?show='.$blockid.'&amp;sesskey='.$USER->sesskey.'" title="'.$strshow.'">'.
-                       '<img src="'.$CFG->pixpath.'/i/show.gif" height="16" width="16" alt="" /></a>';
+                       '<img src="'.$CFG->pixpath.'/i/show.gif" height="16" width="16" alt="'.$strshow.'" /></a>';
             $class = ' class="dimmed_text"'; // Leading space required!
         }
         if ($blockobject->instance_allow_multiple()) {
diff --git a/admin/filters.php b/admin/filters.php
index 9d7832e9b67..8af7797229f 100644
--- a/admin/filters.php
+++ b/admin/filters.php
@@ -201,13 +201,13 @@
         // get hide/show link
         if (in_array($path, $activefilters)) {
             $hideshow = "<a href=\"$myurl&amp;action=hide&amp;filterpath=$upath\">";
-            $hideshow .= "<img src=\"{$CFG->pixpath}/i/hide.gif\" height=\"16\" width=\"16\" alt=\"hide\" /></a>";
+            $hideshow .= "<img src=\"{$CFG->pixpath}/i/hide.gif\" height=\"16\" width=\"16\" alt=\"$txt->hide\" /></a>";
             $hidden = false;
             $displayname = "<span>$name</span>";
         }
         else {
             $hideshow = "<a href=\"$myurl&amp;action=show&amp;filterpath=$upath\">";
-            $hideshow .= "<img src=\"{$CFG->pixpath}/i/show.gif\" height=\"16\" width=\"16\" alt=\"show\" /></a>";
+            $hideshow .= "<img src=\"{$CFG->pixpath}/i/show.gif\" height=\"16\" width=\"16\" alt=\"$txt->show\" /></a>";
             $hidden = true;
             $displayname = "<span class=\"dimmed_text\">$name</span>";
         }
@@ -217,14 +217,14 @@
         if (!$hidden) {
             if ($updowncount>1) {
                 $updown .= "<a href=\"$myurl&amp;action=up&amp;filterpath=$upath\">";
-                $updown .= "<img src=\"$img/up.gif\" alt=\"up\" /></a>&nbsp;";
+                $updown .= "<img src=\"$img/up.gif\" alt=\"$txt->up\" /></a>&nbsp;";
             }
             else {
                 $updown .= "<img src=\"$CFG->pixpath/spacer.gif\" height=\"16\" width=\"16\" alt=\"\" />&nbsp;";
             }
             if ($updowncount<$activefilterscount) {
                 $updown .= "<a href=\"$myurl&amp;action=down&amp;filterpath=$upath\">";
-                $updown .= "<img src=\"$img/down.gif\" alt=\"down\" /></a>";
+                $updown .= "<img src=\"$img/down.gif\" alt=\"$txt->down\" /></a>";
             }
             else {
                 $updown .= "<img src=\"$CFG->pixpath/spacer.gif\" height=\"16\" width=\"16\" alt=\"\" />";
diff --git a/admin/lang.php b/admin/lang.php
index fbc97848e30..adb5ca4e64d 100644
--- a/admin/lang.php
+++ b/admin/lang.php
@@ -74,6 +74,8 @@
     $strchoosefiletoedit = get_string('langchoosefile', 'admin');
     $streditennotallowed = get_string('langnoeditenglish', 'admin');
     $strfilecreated = get_string('langfilecreated', 'admin');
+    $strprev = get_string('previous');
+    $strnext = get_string('next');
 
     // FIXME / TODO
     // remove following lines after adding string into proper english lang pack
@@ -448,9 +450,9 @@
                     if (LANG_DISPLAY_MISSING_LINKS) {
                         $missingtarget = '<a name="missing'.$missingcounter.'"></a>';
                         $missingnext = '<a href="#missing'.($missingcounter+1).'">'.
-                        '<img src="' . $CFG->pixpath . '/t/down.gif" height="11" width="11" border="0" alt="" /></a>';
+                        '<img src="' . $CFG->pixpath . '/t/down.gif" height="11" width="11" border="0" alt="'.$strnext.'" /></a>';
                         $missingprev = '<a href="#missing'.($missingcounter-1).'">'.
-                        '<img src="' . $CFG->pixpath . '/t/up.gif" height="11" width="11" border="0" alt="" /></a>';
+                        '<img src="' . $CFG->pixpath . '/t/up.gif" height="11" width="11" border="0" alt="'.$strprev.'" /></a>';
                     } else {
                         $missingtarget = '';
                         $missingnext = '';
diff --git a/admin/modules.php b/admin/modules.php
index 6ddeae7d7dc..7dd7e73c68d 100644
--- a/admin/modules.php
+++ b/admin/modules.php
@@ -172,11 +172,11 @@
 
         if ($module->visible) {
             $visible = "<a href=\"modules.php?hide=$module->name&amp;sesskey=$USER->sesskey\" title=\"$strhide\">".
-                       "<img src=\"$CFG->pixpath/i/hide.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"\" /></a>";
+                       "<img src=\"$CFG->pixpath/i/hide.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"$strhide\" /></a>";
             $class = "";
         } else {
             $visible = "<a href=\"modules.php?show=$module->name&amp;sesskey=$USER->sesskey\" title=\"$strshow\">".
-                       "<img src=\"$CFG->pixpath/i/show.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"\" /></a>";
+                       "<img src=\"$CFG->pixpath/i/show.gif\" align=\"middle\" height=\"16\" width=\"16\" border=\"0\" alt=\"$strshow\" /></a>";
             $class = "class=\"dimmed_text\"";
         }
         if ($module->name == "forum") {
diff --git a/admin/report/courseoverview/index.php b/admin/report/courseoverview/index.php
index 11819849bf9..c32e3b0928a 100644
--- a/admin/report/courseoverview/index.php
+++ b/admin/report/courseoverview/index.php
@@ -85,7 +85,7 @@
             if (empty($CFG->gdversion)) {
                 echo '<div align="center">(' . get_string("gdneed") .')</div>';
             } else {
-                echo '<div align="center"><img src="'.$CFG->wwwroot.'/'.$CFG->admin.'/report/courseoverview/reportsgraph.php?time='.$time.'&report='.$report.'&numcourses='.$numcourses.'" /></div>';
+                echo '<div align="center"><img alt="'.get_string('courseoverviewgraph').'" src="'.$CFG->wwwroot.'/'.$CFG->admin.'/report/courseoverview/reportsgraph.php?time='.$time.'&report='.$report.'&numcourses='.$numcourses.'" /></div>';
             }
 
             $table = new StdClass;
diff --git a/blocks/admin_bookmarks/block_admin_bookmarks.php b/blocks/admin_bookmarks/block_admin_bookmarks.php
index e332ca0edea..7cb5d87a74a 100644
--- a/blocks/admin_bookmarks/block_admin_bookmarks.php
+++ b/blocks/admin_bookmarks/block_admin_bookmarks.php
@@ -20,7 +20,7 @@ class block_admin_bookmarks extends block_base {
     }
 
     function create_item($visiblename,$link,$icon) {
-        $this->tempcontent .= '<a href="' . $link . '"><img src="' . $icon . '" border="0" alt="[item]" /> ' . $visiblename . '</a><br />' . "\n";
+        $this->tempcontent .= '<a href="' . $link . '"><img src="' . $icon . '" border="0" alt="" /> ' . $visiblename . '</a><br />' . "\n";
     }
 
     function get_content() {
diff --git a/blocks/admin_tree/block_admin_tree.php b/blocks/admin_tree/block_admin_tree.php
index dc495715c86..cad0945e997 100644
--- a/blocks/admin_tree/block_admin_tree.php
+++ b/blocks/admin_tree/block_admin_tree.php
@@ -31,11 +31,13 @@ class block_admin_tree extends block_base {
 
     function open_folder($visiblename) {
         global $CFG;
+        $strfolderopened = s(get_string('folderopened'));
+
         for ($i = 0; $i < $this->currentdepth; $i++) {
             $this->tempcontent .= "&nbsp;&nbsp;&nbsp;";
         }
         $this->tempcontent .= '<a href="javascript:toggle(\'vh_span' . $this->spancounter . '\');">';
-        $this->tempcontent .= '<span id="vh_span' . $this->spancounter . 'indicator"><img src="' . $CFG->wwwroot . '/blocks/admin_tree/open.gif" border="0" alt="[open folder]" /></span> ';
+        $this->tempcontent .= '<span id="vh_span' . $this->spancounter . 'indicator"><img src="' . $CFG->wwwroot . '/blocks/admin_tree/open.gif" border="0" alt="'.$strfolderopened.'" /></span> ';
         $this->tempcontent .= $visiblename . '</a><br /><span id="vh_span' . $this->spancounter . '">' . "\n";
         $this->currentdepth++;
         $this->spancounter++;
@@ -51,7 +53,7 @@ class block_admin_tree extends block_base {
         for ($i = 0; $i < $this->currentdepth; $i++) {
             $this->tempcontent .= "&nbsp;&nbsp;&nbsp;";
         }
-        $this->tempcontent .= '<a class="'.$class.'" href="'.$link.'"><img src="'.$icon.'" border="0" alt="[item]" />'.
+        $this->tempcontent .= '<a class="'.$class.'" href="'.$link.'"><img src="'.$icon.'" border="0" alt="" />'.
                                $visiblename.'</a><br />'."\n";
     }
 
diff --git a/blocks/course_summary/block_course_summary.php b/blocks/course_summary/block_course_summary.php
index 98ee2501599..c5a29678cdb 100644
--- a/blocks/course_summary/block_course_summary.php
+++ b/blocks/course_summary/block_course_summary.php
@@ -33,7 +33,7 @@ class block_course_summary extends block_base {
             } else {
                 $editpage = $CFG->wwwroot.'/course/edit.php?id='.$COURSE->id;
             }
-            $this->content->text .= "<div align=\"right\"><a href=\"$editpage\"><img src=\"$CFG->pixpath/t/edit.gif\" alt=\"\" /></a></div>";
+            $this->content->text .= "<div align=\"right\"><a href=\"$editpage\"><img src=\"$CFG->pixpath/t/edit.gif\" alt=\"".get_string('edit')."\" /></a></div>";
         }
         $this->content->footer = '';
 
diff --git a/blocks/social_activities/block_social_activities.php b/blocks/social_activities/block_social_activities.php
index 6bb508b7cb3..f715c038d18 100644
--- a/blocks/social_activities/block_social_activities.php
+++ b/blocks/social_activities/block_social_activities.php
@@ -51,7 +51,7 @@ class block_social_activities extends block_list {
         $editbuttons = '';
 
         if ($ismoving) {
-            $this->content->icons[] = '&nbsp;<img align="bottom" src="'.$CFG->pixpath.'/t/move.gif" height="11" width="11" alt=\"\" />';
+            $this->content->icons[] = '&nbsp;<img align="bottom" src="'.$CFG->pixpath.'/t/move.gif" height="11" width="11" alt="" />';
             $this->content->items[] = $USER->activitycopyname.'&nbsp;(<a href="'.$CFG->wwwroot.'/course/mod.php?cancelcopy=true&amp;sesskey='.$USER->sesskey.'">'.$strcancel.'</a>)';
         }
 
diff --git a/course/category.php b/course/category.php
index 1094f78e615..a87c13dac17 100644
--- a/course/category.php
+++ b/course/category.php
@@ -344,13 +344,13 @@
 
                 if (has_capability('moodle/site:backup', $coursecontext)) {
                     echo '<a title="'.$strbackup.'" href="../backup/backup.php?id='.$acourse->id.'">'.
-                            '<img src="'.$CFG->pixpath.'/t/backup.gif" height="11" width="11" border="0" alt="" /></a> ';
+                            '<img src="'.$CFG->pixpath.'/t/backup.gif" height="11" width="11" border="0" alt="'.$strbackup.'" /></a> ';
                 }
                     
                 if (has_capability('moodle/site:restore', $coursecontext)) {
                     echo '<a title="'.$strrestore.'" href="../files/index.php?id='.$acourse->id.
                          '&amp;wdir=/backupdata">'.
-                         '<img src="'.$CFG->pixpath.'/t/restore.gif" height="11" width="11" border="0" alt="" /></a> ';
+                         '<img src="'.$CFG->pixpath.'/t/restore.gif" height="11" width="11" border="0" alt="'.$strrestore.'" /></a> ';
                 }
 
                 if (has_capability('moodle/category:update', $context)) {
@@ -381,16 +381,16 @@
                 if (!empty($acourse->guest)) {
                     echo '<a href="view.php?id='.$acourse->id.'"><img hspace="2" title="'.
                          $strallowguests.'" alt="" height="16" width="16" border="0" src="'.
-                         $CFG->pixpath.'/i/user.gif" /></a>';
+                         $CFG->pixpath.'/i/user.gif" alt="'.$strallowguests.'" /></a>';
                 }
                 if (!empty($acourse->password)) {
                     echo '<a href="view.php?id='.$acourse->id.'"><img hspace="2" title="'.
                          $strrequireskey.'" alt="" height="16" width="16" border="0" src="'.
-                         $CFG->pixpath.'/i/key.gif" /></a>';
+                         $CFG->pixpath.'/i/key.gif" alt="'.$strrequireskey.'" /></a>';
                 }
                 if (!empty($acourse->summary)) {
                     link_to_popup_window ("/course/info.php?id=$acourse->id", "courseinfo",
-                                          '<img hspace="2" alt="info" height="16" width="16" border="0" src="'.$CFG->pixpath.'/i/info.gif" />',
+                                          '<img hspace="2" alt="'.get_string('info').'" height="16" width="16" border="0" src="'.$CFG->pixpath.'/i/info.gif" />',
                                            400, 500, $strsummary);
                 }
                 echo "</td>";
diff --git a/course/format/lams/format.php b/course/format/lams/format.php
index de01892fe14..89a875bbc7d 100644
--- a/course/format/lams/format.php
+++ b/course/format/lams/format.php
@@ -260,7 +260,7 @@ while ($section <= $course->numsections) {
 
             if (isediting($course->id)) {
                 echo ' <a title="'.$streditsummary.'" href="editsection.php?id='.$thissection->id.'">'.
-                    '<img src="'.$CFG->pixpath.'/t/edit.gif" border="0" height="11" width="11" alt="" /></a><br /><br />';
+                    '<img src="'.$CFG->pixpath.'/t/edit.gif" border="0" height="11" width="11" alt="'.$streditsummary.'" /></a><br /><br />';
             }
             echo '</div>';
 
@@ -275,11 +275,11 @@ while ($section <= $course->numsections) {
         echo '<td class="right side">';
         if ($displaysection == $section) {      // Show the zoom boxes
             echo '<a href="view.php?id='.$course->id.'&amp;topic=0#section-'.$section.'" title="'.$strshowalltopics.'">'.
-                '<img src="'.$CFG->pixpath.'/i/all.gif" height="25" width="16" border="0" /></a><br />';
+                '<img src="'.$CFG->pixpath.'/i/all.gif" height="25" width="16" border="0" alt="'.$strshowalltopics.'" /></a><br />';
         } else {
             $strshowonlytopic = get_string('showonlytopic', '', $section);
             echo '<a href="view.php?id='.$course->id.'&amp;topic='.$section.'" title="'.$strshowonlytopic.'">'.
-                '<img src="'.$CFG->pixpath.'/i/one.gif" height="16" width="16" border="0" alt="" /></a><br />';
+                '<img src="'.$CFG->pixpath.'/i/one.gif" height="16" width="16" border="0" alt="'.$strshowonlytopic.'" /></a><br />';
         }
 
         if (isediting($course->id)) {
diff --git a/course/index.php b/course/index.php
index aee1fd34a75..93291cf398d 100644
--- a/course/index.php
+++ b/course/index.php
@@ -363,16 +363,16 @@ function print_category_edit($category, $displaylist, $parentslist, $depth=-1, $
 
         if (has_capability('moodle/category:delete', $context)) {
             echo "<a title=\"$str->delete\" href=\"index.php?delete=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                 " src=\"$CFG->pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                 " src=\"$CFG->pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"$str->delete\" /></a> ";
         }
         
         if (has_capability('moodle/category:visibility', $context)) {
             if (!empty($category->visible)) {
                 echo "<a title=\"$str->hide\" href=\"index.php?hide=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                     " src=\"$CFG->pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                     " src=\"$CFG->pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"$str->hide\" /></a> ";
             } else {
                 echo "<a title=\"$str->show\" href=\"index.php?show=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                     " src=\"$CFG->pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"\" /></a> ";
+                     " src=\"$CFG->pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"$str->show\" /></a> ";
             }
         }
 
diff --git a/course/report/stats/report.php b/course/report/stats/report.php
index 747449e5fb8..32ee6d0e7f9 100644
--- a/course/report/stats/report.php
+++ b/course/report/stats/report.php
@@ -108,9 +108,9 @@
                 echo "(".get_string("gdneed").")";
             } else {
                 if ($mode == STATS_MODE_DETAILED) {
-                    echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.$mode.'&course='.$course->id.'&time='.$time.'&report='.$report.'&userid='.$userid.'" /></center>';
+                    echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.$mode.'&course='.$course->id.'&time='.$time.'&report='.$report.'&userid='.$userid.'" alt="'.get_string('statisticsgraph').'" /></center>';
                 } else {
-                    echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.$mode.'&course='.$course->id.'&time='.$time.'&report='.$report.'&roleid='.$roleid.'" /></center>';
+                    echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.$mode.'&course='.$course->id.'&time='.$time.'&report='.$report.'&roleid='.$roleid.'" alt="'.get_string('statisticsgraph').'" /></center>';
                 }
             }
 
diff --git a/course/search.php b/course/search.php
index 4c087753e6f..15fd9636d5b 100644
--- a/course/search.php
+++ b/course/search.php
@@ -193,7 +193,7 @@
                 // checks whether user can update course settings
                 if (has_capability('moodle/course:update', $coursecontext)) {
                     echo "<a title=\"".get_string("settings")."\" href=\"$CFG->wwwroot/course/edit.php?id=$course->id\"><img".
-                        " src=\"$pixpath/t/edit.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                        " src=\"$pixpath/t/edit.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("settings")."\"></a> ";
                 }
 
                 // checks whether user can do role assignment
@@ -205,30 +205,30 @@
                 // checks whether user can delete course
                 if (has_capability('moodle/course:delete', $coursecontext)) {  
                     echo "<a title=\"".get_string("delete")."\" href=\"delete.php?id=$course->id\"><img".
-                        " src=\"$pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                        " src=\"$pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("delete")."\"></a> ";
                 }  
 
                 // checks whether user can change visibility
                 if (has_capability('moodle/course:visibility', $coursecontext)) {
                     if (!empty($course->visible)) {
                         echo "<a title=\"".get_string("hide")."\" href=\"search.php?search=$encodedsearch&amp;perpage=$perpage&amp;page=$page&amp;hide=$course->id&amp;sesskey=$USER->sesskey\"><img".
-                            " src=\"$pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                            " src=\"$pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("hide")."\"></a> ";
                     } else {
                         echo "<a title=\"".get_string("show")."\" href=\"search.php?search=$encodedsearch&amp;perpage=$perpage&amp;page=$page&amp;show=$course->id&amp;sesskey=$USER->sesskey\"><img".
-                            " src=\"$pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                            " src=\"$pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("show")."\"></a> ";
                     }
                 }              
 
                 // checks whether user can do site backup
                 if (has_capability('moodle/site:backup', $coursecontext)) {
                     echo "<a title=\"".get_string("backup")."\" href=\"../backup/backup.php?id=$course->id\"><img".
-                        " src=\"$pixpath/t/backup.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                        " src=\"$pixpath/t/backup.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("backup")."\"></a> ";
                 }
                 
                 // checks whether user can do restore
                 if (has_capability('moodle/site:restore', $coursecontext)) {
                     echo "<a title=\"".get_string("restore")."\" href=\"../files/index.php?id=$course->id&wdir=/backupdata\"><img".
-                        " src=\"$pixpath/t/restore.gif\" height=\"11\" width=\"11\" border=\"0\"></a> ";
+                        " src=\"$pixpath/t/restore.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"".get_string("restore")."\"></a> ";
                 }
 
                 echo "</td></tr>";
diff --git a/course/user.php b/course/user.php
index 8023768be51..2c7cc13c43a 100644
--- a/course/user.php
+++ b/course/user.php
@@ -140,7 +140,7 @@
                 error(get_string('nostatstodisplay'), $CFG->wwwroot.'/course/user.php?id='.$course->id.'&user='.$user->id.'&mode=outline');
             }
 
-            echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.STATS_MODE_DETAILED.'&course='.$course->id.'&time='.$time.'&report='.STATS_REPORT_USER_VIEW.'&userid='.$user->id.'" /></center>';
+            echo '<center><img src="'.$CFG->wwwroot.'/course/report/stats/graph.php?mode='.STATS_MODE_DETAILED.'&course='.$course->id.'&time='.$time.'&report='.STATS_REPORT_USER_VIEW.'&userid='.$user->id.'" alt="'.get_string('statisticsgraph').'" /></center>';
 
             // What the heck is this about?   -- MD
             $stats = stats_fix_zeros($stats,$param->timeafter,$param->table,(!empty($param->line2)),(!empty($param->line3)));
diff --git a/lang/en_utf8/moodle.php b/lang/en_utf8/moodle.php
index 92288d1134c..b7a70f6b7b4 100644
--- a/lang/en_utf8/moodle.php
+++ b/lang/en_utf8/moodle.php
@@ -260,6 +260,7 @@ $string['courseinfo'] = 'Course info';
 $string['coursemessage'] = 'Message course users';
 $string['coursenotaccessible'] = 'This course does not allow public access';
 $string['courseoverview'] = 'Course overview';
+$string['courseoverviewgraph'] = 'Course overview graph';
 $string['coursereject'] = 'Reject a course request';
 $string['courserejected'] = 'Course has been rejected and the requester has been notified.';
 $string['courserejectemail'] = 'Sorry, but the course you requested has been rejected. Here is the reason provided:
@@ -1239,6 +1240,7 @@ $string['startdate'] = 'Course start date';
 $string['startsignup'] = 'Create new account';
 $string['state'] = 'State/Province';
 $string['statistics'] = 'Statistics';
+$string['statisticsgraph'] = 'Statistics graph';
 $string['stats'] = 'Statistics';
 $string['statslogins'] = 'Logins';
 $string['statsmodedetailed'] = 'Detailed (user) view';