I had a look at the Dell SupportAssist OS Recovery for OS Reinstallation on a Dell OptiPlex 7040. This is obtainable using the Dell OS Recovery Tool.
Unfortunately the Tool gives no Language Options when Installing Windows 10, installing it in English USA, with USA Keyboard Format and Date Format.
It also gives Windows 10 Version 1803 opposed to Windows 10 Version 1809.
Screenshots are below.