title: Rails: Remove missing translation errors
body: <p>I am using internationalization for <strong>english (en)</strong> and <strong>french (fr)</strong>, I have used en.yml for limited use and most of the translations I am writing in fr.yml.</p>
  
  <p>With <strong>locale as fr</strong> everything works good, but with <strong>en it shows me error</strong> as missing translation span.</p>
  
  <p>For eg if I have got something like</p>
  
  <pre><code>&lt;%= text_field_tag( "search", params[:search], :placeholder=&gt;t("Search"), :class=&gt;"search_input") %&gt;
  </code></pre>
  
  <p>and i get output for en is:</p>
  
  <pre><code>&lt;input class="search_input" id="search" name="search" placeholder="&lt;span class=" translation_missing"="" title="translation missing: en.Search"&gt;
  </code></pre>
  
  <p>What I want is that it should <strong>turn off translation errors for english</strong>, since english is my default language, but for some cases I've used en.yml.</p>
  
  <p>Or if this is not possible then whole error message should be removed.</p>
  
  <p>Thanks</p>