Hi Krassiy.
if you like to use MiFlash and Fastboot, use the latest fastboot package of 5.4.10 MIUIv6-L 5.0 and Latest MiFlash tool (20141107) from here (both of them already released):
http://en.miui.com/a-234.html
Choose them from site above:
- MiFlash Tool:
Download MIUI ROM Flashing Tool (Size:26M, 29bc366214a42a048e6a7cfb1ca9cc25)
- Fastboot package:
Xiaomi Mi 2/2S Latest Developer Version Fastboot File Download
Select for fastboot script: all_wipe.bat file (it will perfectly clean everything from your phone)
And finally install the multilang vesrion of miui 5.4.10 via updater app or via MiRecovery. If you make full wipe before and after install the multilang version, you cannot make mistake