title: Python langdetect: choose between one language or the other only
body: <p>I'm using <code>langdetect</code> to determine the language of a set of strings which I know are either in English or French.</p>
  
  <p>Sometimes, <code>langdetect</code> tells me the language is Romanian for a string I know is in French.</p>
  
  <p>How can I make <code>langdetect</code> choose between English or French only, and not all other languages?</p>
  
  <p>Thanks!</p>