[Innos D6000] All current ROMs download Innos D6000 ROM

[d6000i]

Hi, I´m new here and I´m suprised about the features I read about the D6000. I would like to buy one, but in each shops they are offering the Innos D6000 just with Android 5. As I understood this thread, there are also updates to Android 5.1. My questions are:
- If there is a Android 5.1 update, I´m looking for a international ROM with German language. Does a rom like this exist and if so, what exactly is the name?
- If it exists, I want to root and run xposed network. Does anyone have tried this combination and provide me with some info, if it works and where I can download related files?
- I would like to install by SD, how do I have to install TWRC and which version? Where can I download all files which I need?
It would be great if someone could provide me also with some links for tools which I need to setup what I explained above.
In advance thank you very much!