For Guest, the home tab is called Continue and for Members it's called Home.
...
<xen:if is="{$visitor.user_id}">
<li class="navTab home PopupClosed"><a href="{$homeLink}" class="navLink">{xen
hrase continue}</a></li>
<xen:else />
<li class="navTab home PopupClosed"><a href="{$homeLink}" class="navLink">{xen
hrase home}</a></li>
</xen:if>