Bonjour,
dans la configuration d'HikaShop, dans l'onglet "Passage en caisse", vous avez l'option "Groupe utilisateur à l'enregistrement" qui permet d'assigner un groupe à l'utilisateur durant l'enregistrement sur le site:
www.hikashop.com/support/documentation/5....html#checkout_login
User group on registration
If set to inherit, HikaShop will use the user group configured in the Joomla user manager settings screen for the user group of newly registered users registering from the HikaShop registration form.
If set to a user group, HikaShop will use that user group instead.
Finally, it's also possible to select a custom address field or a custom user field of the types radio button, simple dropdown, multiple dropdown or checkbox. That way, you can let the customer choose himself his user group among a list of user groups you entered in the values of the custom field.
The custom field values should have the user group id in the "value" column for the system to work properly in such cases.