For all those who want to do a localization I've attached an English language file. Just translate everything after the equal sign with any editor (like Notepad), and send the translation either to
mort@sto-helit.de or post it as reply.
If you want to test it, rename the file to language.dat, copy it to the MortButtons folder on your device, and restart MortButtons (if "stay in memory" is checked, close it with the door icon in the toolbar).