<data priority="50">
    <xpath expr="//t[@t-out='report_title']" position="replace">
        <t t-if="report.id == report.env.ref('account_reports.followup_report').id">
                <span>Ausstehende Rechnungen</span>
        </t>
        <t t-else="">
            <t t-out="report_title"/>
        </t>
    </xpath>
</data>
