Namecard does not work in another site language.

When User A registers on the site using the namecard of user B, they both get easysocial notification as well; user A has to accept connection with B, so they could be friends on the site. But this feature works only if user A registers on Default site language; indeed if we change language site as to French one, user A can always register but no connection is established between users A and B anymore, and no notification arrives.

Help please.