If you downloaded DisplayFusion 12.0 and are having issues with languages please re-download and re-install. We have repacked the release as 12.0c with the languages fixed.
I have a question about behaviour when closing laptop lid.
Is there a possibility to turn off all screens when closing laptop. Because now, when i close laptop my external monitor becames primary monitor, but i want it to turn off.
Unfortunately that's not possible. When the laptop lid closes, the built-in display gets disconnected from the system, and then Windows reconfigures the displays (as you're seeing). We're not able to disconnect other displays before the built-in gets disconnected, so it wouldn't help in your situation
