Well, I just re-downloaded Netfilx and I'm currently on vacation in Turkey.
Now everything is displayed in Turkish! (I'm not logged in)
How can I change the country and then log in micj?
The language itself, you can change in the settings. But you have to register first.
At Netflix, it's normal that if you're in another country, you can watch movies and TV shows that are not available in Germany. Once you're back in Germany, everything will be back to normal. I also had the same when I was in France with my family.