Hmm why not post in both? If you don't like the english text being visible you could do something like a spoiler bar hide the translated version. I just feel like you may be missing out on potential followers and consumers for very little effort or aesthetic preference. I mean it's not like there's 100mil german speaking users on Hive or chances they're going to find out about your content.
I understand german pretty well, btw, but sometimes it takes a lot more effort to consume it so I'd prefer if authors would include both.