Topic: Multiple source XML files formated with multible XSL files

I'm quite new at this so I hope my question isn't too hard for you.

I want to convert XML to HTML.
I have a number of XML files containing information similar to what is found in an ordinary text report (Title, summary, chapters, subchapters, text, links a.s.o.).
Each XML-file contains information in both English and Swedish (<title_en>My report</title_en> and <title_se>Min rapport</title_se> and so on).

I want to use maximum one (1) XSL file to create the English html version of each report (XML file) and one (1) to create the swedish.
I would also like only to extract the summary in English and Swedish and present them as separate htnl files.

How do I make this happen? I cannot point to the XSL file from the XML because I want to apply different styles to it.

Help is much appreciated!!!

Cheers,
Mats

Mats