So, in order to get German voices with English texts, you're apparently supposed to pick a 'customized install' option. Thing is, I can't really find anything even resembling that when installing through Uplay

I haven't heard of anyone else having problems with the customized install option, so I'm starting to feel I'm missing something very obvious. Is the custom install option even a thing with Uplay or does it only apply on physical copies?
The version I'm running is 'Gold Edition', if that has any relevance here.