I have done this recently. I build the templates with id's instead of text, and then put the text in an excel spreadsheet. Each col is a language. I use CPAN modules to pull the translations out of the spreadsheet and generate the pages.

The beauty of doing this in Excel is that you can throw your texts to humans and most of them will be able to cope with this format.

I have the code at home, will look it out for you if you wish. It may be a bit gnarly but it is very functional.

(Funnily enough, ik woon in Antwerpen ... yes really ...)