Hi
to translate, just rename the xpi into a zip file, then unzip it… just add a new folder “pl” (for example if you want to translate into polish) in the locale directory, then in this new directory copy all the files from the en-US directory… to test the result you have to modify two files at the root directory : chrome.manifest and install.rdf (you will understand how these files works ;O) … finally zip it back and rename to a xpi file… that’s all
when finished send me the result to cardbook.thunderbird@gmail.com :O)