title: Translation with custom translation file fails for certain words in Magento
body: <p>I'm developing a custom module for my Magento installation (version 1.6.2.0). I registered a translation file for the module in the config.xml and started to add German translations. The module adds some new behavior to the Magento back end. </p>
  
  <p>While doing the translation I noticed a strange behavior of Magento. Certain words don't get translated by Magento although a translation is provided in the module's csv file. </p>
  
  <p>When I change the key to a different value, the translation works as expected, so Magento seems to see and read the cvs file.</p>
  
  <p>At the moment I notice this behavior for the keys "City" and "Store". </p>
  
  <p>Content of the csv file:</p>
  
  <pre><code>"City","Stadt"
  "City1","Stadt"
  </code></pre>
  
  <p>I use the following line to translate the strings.</p>
  
  <pre><code>Mage::helper('mymodule')-&gt;__('City') // returns "City"
  </code></pre>
  
  <p>When I change the key to "City1" every thing works as expected.</p>
  
  <pre><code>  Mage::helper('mymodule')-&gt;__('City1') // returns "Stadt"
  </code></pre>
  
  <p>After this I searched the German translation csv files (provided by the German Magento Community) for a translation for the key "City" and found one in the "adminhtml module".</p>
  
  <pre><code>  Mage::helper('adminhtml')-&gt;__('City') // returns "Stadt"
  </code></pre>
  
  <p>So this also works as expected.</p>
  
  <p>I don't know what I'm doing wrong. As I said the same behavior occurs for the string "Store".</p>
  
  <p>Any ideas on this? </p>