Hi, Didier.
Please, provide us with link to site with issue and credentials to it.
Edit your first post and add it there.
Hi, Didier.
We have not received any response back from you in over 7 days, and would like to know if you consider this issue to be resolved. If you have any further questions, simply reply to this post.
Hi, Didier.
In edit it comes from js script so it can't be changed easily. Also user don't have to type it manually ;)
Most important is that it is displayed properly when viewing profile.
You may try to upgrade JomSocial to current version -> JomSocial 3.2.0.1 and check if it solve your issue.
Hi, Didier.
No, it's not possible. You'll need to rebuild registration process, field library and profile edit features...