xpath

<?xml version="1.0" ?><!DOCTYPE TS><TS language="es_ES" version="2.1">
<context>
    <name>AboutDialog</name>
    <message>
        <location filename="../src/lib/other/aboutdialog.ui" line="60"/>
        <source>Authors</source>
        <translation>Autores</translation>
    </message>
    <message>
        <location filename="../src/lib/other/aboutdialog.cpp" line="56"/>
        <source>Authors and Contributors</source>
        <translation>Autores y contribuidores</translation>
    </message>
</context>
</TS>

uses
  DOM, XMLRead, XPath;

var
  Xml: TXMLDocument;
  XPathResult: TXPathVariable;
begin
  ReadXMLFile(Xml, 'ts.xml');
  //Get text inside <translation> tag
  XPathResult := EvaluateXPathExpression('/TS/context[name="AboutDialog"]/message[source="Authors"]/translation', Xml.DocumentElement);
  ShowMessage(String(XPathResult.AsText));
  XPathResult.Free;
  Xml.Free;
end;