From what I've seen online, it must be done during installation. So short answer, no.

As others have said, you could also backup your data and do a fresh installation (from a boot media, not from Windows itself just to be extra safe).

ThioJoe also has a video talking about this English (Europe/World) thing and also provide a Powershell script to delete Windows bloatware. This option could be interesting if you don't want to reset your whole installation.

I doubt it. Don't know if a fresh install would, or if you can get it fresh enough to work.

Throw all your important stuff onto a drive thay doesn't contain the OS. Then remove the drive and wipe the computer. You can set it up again and choose the non-bloatware options.