add i18n

app/views/shared/_powered_by.html.erb

@@ -2,12 +2,12 @@
   <% if local_assigns[:with_counter] %>
     <% count = Submitter.where.not(completed_at: nil).distinct.count(:submission_id) %>
     <% if count > 1 %>
-      <b><%= count %></b> documents signed with
+      <%= t('count_documents_signed_with_html', count:) %>
     <% else %>
-      Powered by
+      <%= t('powered_by') %>
     <% end %>
   <% else %>
-    Powered by
+    <%= t('powered_by') %>
   <% end %>
   <a href="<%= Docuseal::PRODUCT_URL %><%= local_assigns[:link_path] %>" class="underline"><%= Docuseal.product_name %></a> - open source documents software
 </div>