pjs/profile/resources/content/selectLang.xul

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://communicator/skin/"?>
<?xul-overlay href="chrome://global/content/dialogOverlay.xul"?>

<!DOCTYPE window SYSTEM "chrome://communicator/locale/profile/selectLang.dtd">

<window id="selectLangWindow"
        title="&langSelBox.title.label;"
        orient="vertical" class="dialog"
        style="width: 30em; -moz-user-focus: ignore;"
        onload="Startup();"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script language="JavaScript" src="chrome://communicator/content/profile/selectLang.js"></script>

    <keyset id="keyset"/>
        
    <text class="label" value="&langList.txt.label;" for="langList"/>

    <separator class="thin" />
    
    <tree class="inset" id="langList" flex="1" 
          ref="urn:mozilla:locale:root" datasources="rdf:chrome"
          sortResource="http://www.mozilla.org/rdf/chrome#name"
          sortDirection="ascending">
      <treecolgroup>
        <treecol flex="1"/>
      </treecolgroup>
      
      <template>
        <treechildren flex="1">
          <treeitem id="treechildren" uri="...">
            <treerow>
              <treecell value="rdf:http://www.mozilla.org/rdf/chrome#displayName"
                        data="rdf:http://www.mozilla.org/rdf/chrome#name"/>
            </treerow>
          </treeitem>
        </treechildren>
      </template>

    </tree>
  
  <box id="okCancelButtons"/>
        
</window>