Hi,
So the French version is the problem?
Did you try to just install NX12.01 because in the nx_install.pdf (page 5) I found this text and it is also mentioned in the README-file:
NX 12.0.1 can be installed as an upgrade of NX 12.0 if NX 12.0 has been previously installed on the workstation. If you currently have any version of NX 12.0 installed on your workstation, skip to the Installing NX 12.0.1 as an Upgrade section of this document for instructions on upgrading NX 12.0 to NX 12.0.1 as your pre-installation checks were performed when NX 12.0 was previously installed.
If you do not have NX 12.0 installed on your workstation, you can install NX 12.0.1 as a new installation and follow the normal installation procedure for NX documented in this guide.
Regards
Mattias
NX5 -> NX12
I-deas 12, NX I-deas6.6
Solid Works 2017