merge translated text into English structure (similar

HI,
With Saxon 8, XSLT 2.0 in use, I can get a merge process to work pretty well
using examples that I found online (thanks to all of you who posted on merging
files). But I have hit a snag on the best way to handle the mixed-content
elements, where if English has child elements that don't appear in the
translation, I would like to go ahead and poke in the translated text for the
element, and generate a comment about the missing children in the matching
location in the translated file ($doc2). Knowing that it is hard to understand
without examples, here is my sample content:

English (note the <b> elements in the <p>):
<section>
<p otherprops="purpose">Use the screen to access <b>M</b>echanism
<b>E</b>xercise <b>D</b>iagnostics for the Supply.</p>
<fig outputclass="sidebar">
<p product="FIS"><xref href="../docs/RefGuide/Centers/MicroIA_Center.xml">Tell
me more about Supply</xref></p>
</fig>
</section></

Translation:
<section>
<p otherprops="purpose">Utilice la pantalla Tambor para acceder a los MEDs del
tambor.</p>
<fig outputclass="sidebar">
<p product="FIS"><xref href="dummy.xml">Para saber mas sobre el
tambor</xref></p>
</fig>
</section>

Desired output:
<section>
<p otherprops="purpose">Utilice la pantalla Tambor para acceder a los MEDs del
tambor.<!-- missing child b --><!-- missing child b --><!-- missing child b
--></p>
<fig outputclass="sidebar">
<p product="FIS"><xref href="../docs/RefGuide/Centers/MicroIA_Center.xml">Para
saber mas sobre el tambor </xref></p>
</fig>
</section>

Partial XSLT (already have loaded translated file as $doc2, and have passed
through the <section> element:
<xsl:template match="p">
	<xsl:variable name="transText"><xsl:value-of select="$doc2//*[saxon:path() =
current()/saxon:path()]/." /></xsl:variable>
        <xsl:element name="p">
			<xsl:copy-of select="@*"/>
				<xsl:choose>
					<xsl:when test="child::*"><!-- what test to use, how to handle mixed
content and output comments when structure in doc2 doesn't match?
--></xsl:when>
					<xsl:otherwise><xsl:value-of select="$transText" /></xsl:otherwise>
				</xsl:choose>
        </xsl:element>
</xsl:template>

Thanks, Dorothy