diff --git a/backend/internal/handler/dev_handler_test.go b/backend/internal/handler/dev_handler_test.go
index edc1513f..7647b30c 100644
--- a/backend/internal/handler/dev_handler_test.go
+++ b/backend/internal/handler/dev_handler_test.go
@@ -23,16 +23,20 @@ func (m *MockKetoService) CheckPermission(ctx context.Context, subject, namespac
 	args := m.Called(ctx, subject, namespace, object, relation)
 	return args.Bool(0), args.Error(1)
 }
+
 func (m *MockKetoService) CreateRelation(ctx context.Context, namespace, object, relation, subject string) error {
 	return m.Called(ctx, namespace, object, relation, subject).Error(0)
 }
+
 func (m *MockKetoService) DeleteRelation(ctx context.Context, namespace, object, relation, subject string) error {
 	return m.Called(ctx, namespace, object, relation, subject).Error(0)
 }
+
 func (m *MockKetoService) ListRelations(ctx context.Context, namespace, object, relation, subject string) ([]service.RelationTuple, error) {
 	args := m.Called(ctx, namespace, object, relation, subject)
 	return args.Get(0).([]service.RelationTuple), args.Error(1)
 }
+
 func (m *MockKetoService) ListObjects(ctx context.Context, namespace, relation, subject string) ([]string, error) {
 	args := m.Called(ctx, namespace, relation, subject)
 	return args.Get(0).([]string), args.Error(1)
diff --git a/locales/en.toml b/locales/en.toml
index 79dbcf4f..34f59690 100644
--- a/locales/en.toml
+++ b/locales/en.toml
@@ -248,6 +248,7 @@ note = "Note"
 load_error = "Error loading client: {{error}}"
 loading = "Loading client..."
 saved = "Saved"
+save_error = "Failed to save: {{error}}"
 
 [msg.dev.clients.general.identity]
 logo_help = "Logo Help"
diff --git a/locales/ko.toml b/locales/ko.toml
index a8392019..a26268f5 100644
--- a/locales/ko.toml
+++ b/locales/ko.toml
@@ -248,6 +248,7 @@ note = "엔드포인트는 읽기 전용으로 유지하고, 비밀키 재발행
 load_error = "Error loading client: {{error}}"
 loading = "Loading client..."
 saved = "설정이 저장되었습니다."
+save_error = "저장 실패: {{error}}"
 
 [msg.dev.clients.general.identity]
 logo_help = "인증 화면에 표시될 PNG/SVG URL입니다."
diff --git a/locales/template.toml b/locales/template.toml
index 40dbc74b..f11f6cbd 100644
--- a/locales/template.toml
+++ b/locales/template.toml
@@ -248,6 +248,7 @@ note = ""
 load_error = ""
 loading = ""
 saved = ""
+save_error = ""
 
 [msg.dev.clients.general.identity]
 logo_help = ""
@@ -1063,8 +1064,8 @@ name = ""
 delete = ""
 
 [ui.dev.clients.general.security]
-confidential = ""
-public = ""
+private = ""
+pkce = ""
 title = ""
 
 [ui.dev.clients.help]
@@ -1097,8 +1098,8 @@ status = ""
 type = ""
 
 [ui.dev.clients.type]
-confidential = ""
-public = ""
+private = ""
+pkce = ""
 
 [ui.dev.dashboard]
 ready_badge = ""