Fix custom translations with options

config/initializers/i18n_translation.rb

@@ -12,7 +12,15 @@ def t(key, options = {})
         i18_content = I18nContent.find_by(key: key)
         translation = I18nContentTranslation.find_by(i18n_content_id: i18_content&.id,
                                                      locale: current_locale)&.value
-        translation.presence || translate(key, options)
+        if translation.present?
+          if options.present?
+            translation % options
+          else
+            translation
+          end
+        else
+          translate(key, options)
+        end
       end
     end
   end

spec/features/site_customization/information_texts_spec.rb

@@ -30,4 +30,26 @@
       expect(page).not_to have_content "Help about proposals"
     end
   end
+
+  scenario "Show custom text with options", :js do
+    admin = create(:administrator)
+    user = create(:user, username: "Rachel")
+    create(:budget_investment, author_id: user.id)
+
+    intro_key = "mailers.budget_investment_created.intro"
+    create(:i18n_content, key: intro_key, value_en: "Hi %{author}")
+
+    login_as(admin.user)
+    visit admin_site_customization_information_texts_path(tab: "mailers")
+
+    expect(page).to have_content "Hi %{author}"
+
+    fill_in "contents[content_#{intro_key}]values[value_en]", with: "Custom hi to %{author}"
+    click_button "Save"
+
+    visit admin_system_email_view_path("budget_investment_created")
+
+    expect(page).to have_content "Custom hi to Rachel"
+    expect(page).not_to have_content "%{author}"
+  end
 end