This one was not easy to discover, so I’m going to post it here for future reference. In C:\Program Files\Microsoft Office\Office12\Bibliography\Style\Iso690Nmerical.xsl change the following lines: <xsl:template name="templ_prop_OpenBracket" > <xsl:param name="LCID" /> <xsl:variable name="_LCID"> <xsl:call-template name="localLCID"> <xsl:with-param name="LCID" select="$LCID"/> </xsl:call-template> </xsl:variable> <xsl:value-of select="/*/b:Locals/b:Local[@LCID[...]