Yes, I can confirm that the REGEDIT solution does not work when your default computer language is another English (E.g. UK)

Ah, OK. There are other programs which also seemed to have caused similar issues for windows : https://answers.microsoft.com/en-us/windows/forum/all/windows-keeps-automatically-adding-en-us-keyboard/69aaea0d-f588-4d54-89fa-a632ae7bced3?page=16 and so...

I have the same problem.... but with English (Canada) and Danish as my 2 main languages.Opening ArchiCAD automatically adds another keyboard layout which cannot be removed, which is more than a little inconvenient as I switch between two alphabets fr...