Add this to your customization layer:
<xsl:param name="local.l10n.xml" select="document('')"/>
<l:i18n xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0">
<l:l10n language="en">
<l:context name="section-xref-numbered">
<l:template name="bridgehead" text='Section %n, "%t"'/>
<l:template name="sect1" text='Section %n, "%t"'/>
<l:template name="sect2" text='Section %n, "%t"'/>
<l:template name="sect3" text='Section %n, "%t"'/>
<l:template name="sect4" text='Section %n, "%t"'/>
<l:template name="sect5" text='Section %n, "%t"'/>
<l:template name="section" text='Section %n, "%t"'/>
</l:context>
</l:l10n>
</l:i18n>
Dennis Grace