An example of 'switch'

 <?xml version="1.0"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 12 August 1999//EN"
  "http://www.w3.org/Graphics/SVG/svg-19990812.dtd">
 <svg width="300pt" height="140pt">
   <switch>
     <text x="20" y="80" system-language="fr">Bonjour</text>
     <text x="20" y="80" system-language="nl">Goedemorgen</text>
     <text x="20" y="80">Hello 
      <tspan xml:lang="fr">tout le monde!</tspan></text>
   </switch>
 </svg>