As one cannot find the names of the standard folder types in the registry, I believe that unfortunately they are built-into the Windows software.
As a proof I found, for example, "Pictures and Videos" as a unicode string inside shell32.dll. Moreover, it was found among other non-related strings. So it doesn't seem that there was any attempt to package together all the folder types, meaning that they were added one-by-one as new types were invented by the UI designers of Microsoft.
I am afraid that this sloppy and short-sighted manner of programming by Microsoft makes your request impossible.
In any case, I don't believe you would want to hack shell32.dll.