diff --git a/mod/forum/classes/local/exporters/author.php b/mod/forum/classes/local/exporters/author.php
index 4ef65200fcc..17a3ceb8d5b 100644
--- a/mod/forum/classes/local/exporters/author.php
+++ b/mod/forum/classes/local/exporters/author.php
@@ -172,7 +172,7 @@ class author extends exporter {
 
                     return [
                         'id' => $group->id,
-                        'name' => $group->name,
+                        'name' => format_string($group->name, true, ['context' => $context]),
                         'urls' => [
                             'image' => $imageurl ? $imageurl->out(false) : null,
                             'group' => $groupurl ? $groupurl->out(false) : null
diff --git a/mod/forum/classes/local/exporters/discussion.php b/mod/forum/classes/local/exporters/discussion.php
index 38cf2268089..8270d9fa378 100644
--- a/mod/forum/classes/local/exporters/discussion.php
+++ b/mod/forum/classes/local/exporters/discussion.php
@@ -174,7 +174,7 @@ class discussion extends exporter {
             // or if it's been deleted and the discussion record hasn't been updated.
             if ($group) {
                 $groupdata = [
-                    'name' => $group->name,
+                    'name' => format_string($group->name, true, ['context' => $this->related['context']]),
                     'urls' => [],
                 ];
 
diff --git a/mod/forum/classes/post_form.php b/mod/forum/classes/post_form.php
index 5e603e2be25..dc377af6096 100644
--- a/mod/forum/classes/post_form.php
+++ b/mod/forum/classes/post_form.php
@@ -174,7 +174,7 @@ class mod_forum_post_form extends moodleform {
                     // We must make this check because all groups are returned for a visible grouped activity.
                     if (forum_user_can_post_discussion($forum, $groupid, null, $cm, $modcontext)) {
                         // Build the data for the groupinfo select.
-                        $groupinfo[$groupid] = $group->name;
+                        $groupinfo[$groupid] = format_string($group->name, true, ['context' => $modcontext]);
                     } else {
                         unset($groupdata[$groupid]);
                     }
diff --git a/mod/forum/report/summary/classes/output/filters.php b/mod/forum/report/summary/classes/output/filters.php
index 54a6eea837c..0c350f1fe85 100644
--- a/mod/forum/report/summary/classes/output/filters.php
+++ b/mod/forum/report/summary/classes/output/filters.php
@@ -24,6 +24,7 @@
 
 namespace forumreport_summary\output;
 
+use context_course;
 use moodle_url;
 use renderable;
 use renderer_base;
@@ -31,8 +32,6 @@ use stdClass;
 use templatable;
 use forumreport_summary;
 
-defined('MOODLE_INTERNAL') || die();
-
 /**
  * Forum summary report filters renderable.
  *
@@ -186,8 +185,9 @@ class filters implements renderable, templatable {
             $allowedgroupsobj = $usergroups;
         }
 
+        $contextcourse = context_course::instance($this->courseid);
         foreach ($allowedgroupsobj as $group) {
-            $groupsavailable[$group->id] = $group->name;
+            $groupsavailable[$group->id] = format_string($group->name, true, ['context' => $contextcourse]);
         }
 
         // Set valid groups selected.