After few weeks of trying i finally found solution.
In short - change language in bcdedit / windows / settings / sysprep / regedit and etc. won't work.
You just need to replace your current winre.wim file to the one from Windows that have language that you prefer.
I did it simply, download Windows 10 Pro Eng ISO and extract it. Then mount /sources/install.esd file and it creates install .wim - here you go to /Windows/System32/Recovery and cut the winre.wim file and move it to your system.
Well, it's almost done. Run cmd by admin and use command:
reagentc /setreimage /path C:\windows\system32\recovery
After that one more:
reagentc /enable
Here it is. After that i restart my laptop and go to RE in Safe Mode and it become totally on English.