freeswitch/conf/vanilla/lang/es/es_ES.xml

<include>
  <language name="es" sound-path="$${sounds_dir}/es/ES/cristina" tts-engine="cepstral" tts-voice="marta">
    <phrases>
      <macros>
        <X-PRE-PROCESS cmd="include" data="demo/*-es-ES.xml"/> <!-- Note: this now grabs whole subdir, previously grabbed only demo.xml -->
        <!--voicemail_es_ES_tts is purely implemented with tts, we have the files based one that is the default. -->
        <X-PRE-PROCESS cmd="include" data="vm/sounds-es-ES.xml"/>  <!-- vm/tts.xml if you want to use tts and have cepstral -->
        <X-PRE-PROCESS cmd="include" data="dir/sounds-es-ES.xml"/>  <!-- dir/tts.xml if you want to use tts and have cepstral -->
      </macros>
    </phrases>
  </language>
</include>