Hi again,
just to tell the interested folks (and close this question), there IS a translation helper which is customized to Nabble's translation requirements. It was already proven in practice. Please see the link within the message below:
http://support.nabble.com/Post-the-original-Nabble-English-files-in-that-post-I-ll-trasl-it-to-German-tp6683384p7589130.htmlIt would be great if the link posted in the message above could be added to the official translation guide.