sapi5 driver does not list all installed voices

[hapasa]

The current sapi5,py appears to list the voices that are available in the windows registry under:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech\Voices\Tokens\

However, a more comprehensive list is in the registry under

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Speech_OneCore\Voices\Tokens\

and this latter list is what Windows Settings -> Speech ->Voices shows.

Also the language attribute is available in the registry, but that is REG_SZ value 409 for English, 407 for German, etc.
I'm not sure how to map that to ISO language code, presumably a ready made mapping table is somewhere.

I'm testing with Windows 10, not sure if Windows 11 is the same.