title: Add language resources in android apk application
body: <p>Well I have a single language android application that I translated strings in <strong>res/values/strings.xml</strong> to make it multi language application. I made for instance <strong>values-fr/strings.xml</strong>, <strong>values-es/strings.xml</strong> ...
  When compiling my application, I get this error 
  mayapp/res/values-fr/strings.xml:1: error: Error parsing XML: XML declaration not well-formed
  mayapp/res/values-es/strings.xml:1: error: Error parsing XML: XML declaration not well-formed</p>
  
  <p>How to solve this problem.
  I need your help since I'am new in android development. </p>