Localize assignees and reviewers label

app/helpers/issuables_helper.rb

@@ -20,13 +20,13 @@ module IssuablesHelper
   end
 
   def assignees_label(issuable, include_value: true)
-    label = 'Assignee'.pluralize(issuable.assignees.count)
+    assignees = issuable.assignees
 
     if include_value
       sanitized_list = sanitize_name(issuable.assignee_list)
-      "#{label}: #{sanitized_list}"
+      ns_('NotificationEmail|Assignee: %{users}', 'NotificationEmail|Assignees: %{users}', assignees.count) % { users: sanitized_list }
     else
-      label
+      ns_('NotificationEmail|Assignee', 'NotificationEmail|Assignees', assignees.count)
     end
   end
 

app/helpers/merge_requests_helper.rb

@@ -176,13 +176,12 @@ module MergeRequestsHelper
 
   def reviewers_label(merge_request, include_value: true)
     reviewers = merge_request.reviewers
-    reviewer_label = 'Reviewer'.pluralize(reviewers.count)
 
     if include_value
       sanitized_list = sanitize_name(reviewers.map(&:name).to_sentence)
-      "#{reviewer_label}: #{sanitized_list}"
+      ns_('NotificationEmail|Reviewer: %{users}', 'NotificationEmail|Reviewers: %{users}', reviewers.count) % { users: sanitized_list }
     else
-      reviewer_label
+      ns_('NotificationEmail|Reviewer', 'NotificationEmail|Reviewers', reviewers.count)
     end
   end
 

locale/gitlab.pot

@@ -21062,6 +21062,26 @@ msgstr ""
 msgid "Notification settings saved"
 msgstr ""
 
+msgid "NotificationEmail|Assignee"
+msgid_plural "NotificationEmail|Assignees"
+msgstr[0] ""
+msgstr[1] ""
+
+msgid "NotificationEmail|Assignee: %{users}"
+msgid_plural "NotificationEmail|Assignees: %{users}"
+msgstr[0] ""
+msgstr[1] ""
+
+msgid "NotificationEmail|Reviewer"
+msgid_plural "NotificationEmail|Reviewers"
+msgstr[0] ""
+msgstr[1] ""
+
+msgid "NotificationEmail|Reviewer: %{users}"
+msgid_plural "NotificationEmail|Reviewers: %{users}"
+msgstr[0] ""
+msgstr[1] ""
+
 msgid "NotificationEvent|Change reviewer merge request"
 msgstr ""
 

spec/helpers/issuables_helper_spec.rb

@@ -44,6 +44,60 @@ RSpec.describe IssuablesHelper do
     end
   end
 
+  describe '#assignees_label' do
+    let(:issuable) { build(:merge_request) }
+    let(:assignee1) { build_stubbed(:user, name: 'Jane Doe') }
+    let(:assignee2) { build_stubbed(:user, name: 'John Doe') }
+
+    before do
+      allow(issuable).to receive(:assignees).and_return(assignees)
+    end
+
+    context 'when multiple assignees exist' do
+      let(:assignees) { [assignee1, assignee2] }
+
+      it 'returns assignee label with assignee names' do
+        expect(helper.assignees_label(issuable)).to eq("Assignees: Jane Doe and John Doe")
+      end
+
+      it 'returns assignee label only with include_value: false' do
+        expect(helper.assignees_label(issuable, include_value: false)).to eq("Assignees")
+      end
+
+      context 'when the name contains a URL' do
+        let(:assignees) { [build_stubbed(:user, name: 'www.gitlab.com')] }
+
+        it 'returns sanitized name' do
+          expect(helper.assignees_label(issuable)).to eq("Assignee: www_gitlab_com")
+        end
+      end
+    end
+
+    context 'when one assignee exists' do
+      let(:assignees) { [assignee1] }
+
+      it 'returns assignee label with no names' do
+        expect(helper.assignees_label(issuable)).to eq("Assignee: Jane Doe")
+      end
+
+      it 'returns assignee label only with include_value: false' do
+        expect(helper.assignees_label(issuable, include_value: false)).to eq("Assignee")
+      end
+    end
+
+    context 'when no assignees exist' do
+      let(:assignees) { [] }
+
+      it 'returns assignee label with no names' do
+        expect(helper.assignees_label(issuable)).to eq("Assignees: ")
+      end
+
+      it 'returns assignee label only with include_value: false' do
+        expect(helper.assignees_label(issuable, include_value: false)).to eq("Assignees")
+      end
+    end
+  end
+
   describe '#issuable_meta' do
     let(:user) { create(:user) }