Hey Leif,
That's great news! We'd love to have a Swedish translation, and we'll be happy to help.
There is a pretty nice tool to assist you with translations, located here:
http://wbmtranslator.labs.libre-entreprise.org/The module itself can be downloaded here:
http://wbmtranslator.labs.libre-entreprise.org/wbmtranslator.wbm.gzIt is a Webmin module that allows you to edit the correct files without having to edit them in a text editor from the command line. I still tend to do my work in the text editor anyway, but if you're unsure where to start, this makes it pretty easy--just be sure to save your work often (it's possible that an upgrade could overwrite your lang files!). It can also be used to send your work to the translations at webmin dot com address where Martin or Jamie will drop them into the official releases.
Here's the official documentation on translating Webmin modules:
http://www.webmin.com/modules-newlang.htmlThis covers doing it from the command line and points you to some tools to make it easier.
If you have any questions, Martin "awe-inspiring former translation co-ordinator who no longer co-ordinates but still manages to be a lot of help" Mewes and I are both here to answer any questions you might have.