I start the game through battle.net today and the game is in English.I have Polish at battle.net and in setting game. Someone had a similar problem?
PS:Yesterday everything was ok except pingu
Yes. I have same problem tonight.
I had the same problem two days ago. I didn’t change anything.
Yesterday everthing was okay, but today the error reappeared 
The settings in the launcher are all set to German, but the game starts in English.
When I want to change it ingame, there is only an empty pull down menu.
I have this problem too. I always played with italian language, but today it only starts in english. I tryed to change it in game and battle.net but it dosen’t work. 
Confirm. This problem back again. English only.
Workaround…