Hi, I also got this problem when configuring OpenCore. I had to force NVRAM override in the Block part just below of the Plist.

​

```

<key>Block</key>

<dict>

<key>4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14</key>

<array>

    <string>UIScale</string>

</array>

<key>7C436110-AB2A-4BBB-A880-FE41995C9F82</key>

<array>

    <string>boot-args</string>

    <string>prev-lang:kbd</string>

</array>

</dict>

```

​

I don't know if that will help you but without this the setup was always in Russian. Also, it only happened on one of the 2 PC i installed MacOS.