To register, click on "créer un compte" = "Create Account" and fill in as below, note that
- on the first row : the NAME is the name pseudo under which you will appear when you will post in the forum
- on the second row, IDENTIFIANT is the name used to connect with the password, ,
To simplify, take the same name in the two zones, It's what I did.
Note you can change the name afterwards by accessing your profile.