View for http://bdunagan.com/2014/09/01/rails-internationalization-at-scale/

missing_keys.html.erb

# views/home/missing_keys.html.erb
<h1>Localization</h1>
<ul>
    <li><%= link_to "Unlocalized", "#unlocalized" %></li>
    <li><%= link_to "Localized", "#localized" %></li>
</ul> 

<h2 id="unlocalized">Unlocalized: <%= @missing_keys.count %> missing out of <%= @missing_keys.count + @found_keys.count %></h2>
<ul style="list-style:none; line-height:22px; margin-left:-40px">
  <% @missing_keys.each do |key, value| %>
    <% # Default to :en for readability. %>
    <% translation = value.include?(I18n.locale) ? t(key) : t(key, :locale => :en) %>
    <li><strong><%= key %></strong> <span style="color:#666">[<%= value.join(",") %>]</span>: <%= translation %></li>
  <% end %>
</ul>

<h2 id="localized">Localized: <%= @found_keys.count %> out of <%= @missing_keys.count + @found_keys.count %></h2>
<ul style="list-style:none; line-height:22px; margin-left:-40px">
  <% @found_keys.each do |key| %>
    <li><strong><%= key %></strong>: <%= t(key) %></li>
  <% end %>
</ul>