Fascinating. Not sure whether this is good or bad. German subreddits are usually either trashy or dead. The german community already did something similar some years ago, and created a dozen localized subs of english topsubs and some localized cultural subs. Most of those did not grew very well IMHO.
I think a major problem for this was the limitations of german community. It's seems most are very young with very specific interessts and culture, so naturally they end up with content that caters to just those people, while the rest just hangs out in the better international subs.