I have been playing for the last couple of days and it works like a charm.
Great job there, Stardock and Kalypso.
I felt like playing over my holiday but at least for the German version of EU Stardock and Kalypso fucked things up. It seems as of December 24th patches for Endless Universe German still are not up to date, so buying from Kalypso will get you a version that probably will be always behind upstream patches:
On the other hand, I-Mod (the modder team who did the german translation for Kalypso) is forbidden to give away the language files to use them with DA and ToA bought via Stardock, so they couldn't keep their promise due to legal issues:
I am really sorry Stardock, but your efforts to get a localized retail version into german shops failed again. Yesterday I gave Dread Lords (german retail from Paradox) another try and although updated to 1.53.xxx via Impulse the translation still stinks (still not completely translated, atmosphere killing word by word translation, ...). I fear it will turn out the same with Kalypso and their lousy german distribution, but getting EU seems to be the only chance to try out I-Mods translation at all. I hope registring on Impulse will give me the chance to switch to the english original in case (remember, users of EU want to get updates the same time as all the others), but there is no way to find out how "EU German" behaves.