Hi Tomica,
I am Dave, I will help you with this.
1
In the Settings App, if you select the US English keyboard and go into its options, can you remove the UK English keyboard as a sub keyboard option forfm there?
2
If not, click your Start Button, then just type regedit and press Enter to open the Registry Editor
Click View and make sure 'Address Bar' is turned on.
Paste this into the Address Bar at the top and hit Enter.
HKEY_USERS.DEFAULT\Keyboard Layout\Preload
In the left pane, right click and delete the Preload key (folder)
Close the Registry Editor and restart (not shut down) your PC.
2
Right click your Start Button, choose Powershell (admin)
Paste this commend into Powershell and hit Enter:
$1 = New-WinUserLanguageList en-US
Then, paste this commend into Powershell and hit Enter:
Set-WinUserLanguageList $1
Close PowerShell and restart your PC
That will remove all keyboards and just leave the US English keyboard, you can then add back the Serbian and Hungarian keyboards manually in the Settings app