title: MongoDB Replace specific array values
body: <p>In MongoDB, I have a movie collection that has an array of languages , e.g.<br>
  <code>languages: [0:USA, 1: German, 2: French, ...etc]</code></p>
  
  <p>The array values are not in any particular order. </p>
  
  <p>How can I now update an array value based on some specific value? Let's say I want to update all "French" and replace it with "Francais" for the entire collection. How can I do that?</p>