diff --git a/app/assets/stylesheets/comments.css b/app/assets/stylesheets/comments.css
index 5ac852793..e2e838fc7 100644
--- a/app/assets/stylesheets/comments.css
+++ b/app/assets/stylesheets/comments.css
@@ -126,6 +126,9 @@
     max-inline-size: var(--comment-max);
     text-align: center;
 
+    strong {
+      font-weight: 600;
+    }
 
     &::before {
       /* Make up space for lack of avatar */
diff --git a/app/models/card/eventable/system_commenter.rb b/app/models/card/eventable/system_commenter.rb
index f07c702c0..b4e0ed417 100644
--- a/app/models/card/eventable/system_commenter.rb
+++ b/app/models/card/eventable/system_commenter.rb
@@ -15,19 +15,19 @@ class Card::Eventable::SystemCommenter
     def comment_body
       case event.action
       when "card_assigned"
-        "#{event.creator.name} assigned this to #{event.assignees.pluck(:name).to_sentence}."
+        "<strong>Assigned</strong> to #{event.assignees.pluck(:name).to_sentence} by #{event.creator.name}."
       when "card_unassigned"
-        "#{event.creator.name} unassigned from #{event.assignees.pluck(:name).to_sentence}."
+        "<strong>Unassigned</strong> from #{event.assignees.pluck(:name).to_sentence} by #{event.creator.name}."
       when "card_staged"
-        "#{event.creator.name} moved this to '#{event.stage_name}'."
+        "<strong>Moved to ‘#{event.stage_name}’</strong> by #{event.creator.name}."
       when "card_closed"
-        "Closed as “#{ card.closure.reason }” by #{ event.creator.name }"
+        "<strong>Closed as ‘#{ card.closure.reason }’</strong> by #{ event.creator.name }"
       when "card_reopened"
-        "Reopened by #{ event.creator.name }"
+        "<strong>Reopened</strong> by #{ event.creator.name }"
       when "card_title_changed"
-        "#{event.creator.name} changed the title from '#{event.particulars.dig('particulars', 'old_title')}' to '#{event.particulars.dig('particulars', 'new_title')}'."
+        "<strong>Title changed</strong> from ‘#{event.particulars.dig('particulars', 'old_title')}’ to ‘#{event.particulars.dig('particulars', 'new_title')}’ by #{event.creator.name}."
       when "card_collection_changed"
-      "#{event.creator.name} moved this from '#{event.particulars.dig('particulars', 'old_collection')}' to '#{event.particulars.dig('particulars', 'new_collection')}'."
+      "<strong>Moved</strong> from ‘#{event.particulars.dig('particulars', 'old_collection')}’ to ‘#{event.particulars.dig('particulars', 'new_collection')}’ by #{event.creator.name}."
       end
     end
 end
diff --git a/app/views/cards/comments/_comment.html.erb b/app/views/cards/comments/_comment.html.erb
index 3bb9a177a..1f7f748de 100644
--- a/app/views/cards/comments/_comment.html.erb
+++ b/app/views/cards/comments/_comment.html.erb
@@ -21,7 +21,7 @@
 
           <%= link_to edit_card_comment_path(comment.card, comment),
                 class: "comment__edit btn btn--circle borderless translucent" do %>
-            <%= icon_tag "menu-dots-horizontal" %> 
+            <%= icon_tag "menu-dots-horizontal" %>
             <span class="for-screen-reader">Edit this comment</span>
           <% end %>
 
diff --git a/test/models/card/eventable/system_commenter_test.rb b/test/models/card/eventable/system_commenter_test.rb
index 67678d32e..343ed2716 100644
--- a/test/models/card/eventable/system_commenter_test.rb
+++ b/test/models/card/eventable/system_commenter_test.rb
@@ -7,7 +7,7 @@ class Card::Eventable::SystemCommenterTest < ActiveSupport::TestCase
   end
 
   test "card_assigned" do
-    assert_system_comment "David assigned this to Kevin." do
+    assert_system_comment "Assigned to Kevin by David." do
       @card.toggle_assignment users(:kevin)
     end
   end
@@ -16,25 +16,25 @@ class Card::Eventable::SystemCommenterTest < ActiveSupport::TestCase
     @card.toggle_assignment users(:kevin)
     @card.comments.destroy_all # To skip deduplication logic
 
-    assert_system_comment "David unassigned from Kevin" do
+    assert_system_comment "Unassigned from Kevin by David" do
       @card.toggle_assignment users(:kevin)
     end
   end
 
   test "card_staged" do
-    assert_system_comment "David moved this to 'In progress'" do
+    assert_system_comment "Moved to ‘In progress’ by David" do
       @card.change_stage_to workflow_stages(:qa_in_progress)
     end
   end
 
   test "card_closed" do
-    assert_system_comment "Closed as “Done” by David" do
+    assert_system_comment "Closed as ‘Done’ by David" do
       @card.close
     end
   end
 
   test "card_title_changed" do
-    assert_system_comment "David changed the title from 'The text is too small' to 'Make text larger'." do
+    assert_system_comment "Title changed from ‘The text is too small’ to ‘Make text larger’ by David." do
       @card.update! title: "Make text larger"
     end
   end