I came across Nightmonkey.
an intuitive interface for translating package descriptions. Translating DDTP descriptions is usually a mess but Nighmonkey enables you to filter out the packages of each repository that are more important to translate: those found in the software center or that are very popular. You can easily see what is left to do, and you can search for particular package descriptions as well. For more information, see Nightmonkey's wiki page.I used it to complete the German translations for GNUmed. Please help with the other translations.