Clarification related to coded spirit names.

[nox]

Hi everyone.
On your experience with the bardonian spirits al the names are coded(except the Mercury genii),
or just the planetary spheres are ?
I m asking because I worked in the past with some spirits from the Earth sphere using the names from PME and i had no issues so i always had the feeling that only the names of the planetary spirits are coded.(except the Mercury genii of course)

Thanks
Nox