There is currently no screen protector available from Digitec for this model. However, there is a case that comes with it that covers the back and goes up to the front.
Why don't you just set the phone to German? It's 100% possible, take a look at the languages...
2. you install the launcher like any other Android phone on the market: open the Play Store, download+install the launcher, open the launcher and set it as the default launcher...
Unfortunately, we currently have no possibility to record the 256 GB version. As soon as something changes in this regard, we will of course make an effort to record it.