Hoped there was a way like this:
<xsl:copy-of select="${<xsl:copy-of select='textNo'/>}"/>

Check out the faq and the w3 docs for more details, but essentially
you can do this one path by having a "reference map" of sorts.

ie:
the xslt 1.0 way

map.xml
<textstrings>
<textstring id="text-1">Don't you love maps</textstring>
<texstring id="text-2">yes, yes I do</textstring>
</textstring>

in the xslt:
<xsl:variable name="textstrings" select="document(map.xml)/textstrings" />
<xsl:key name="texts" match="$textstrings/textstring" use="@id"/>

There's a shorter way to do this in xslt 2.0, don't remember off the
top of my head.