Hello Chouby,
I have the same problem, no flag any more after upgrading. For french it is ok but for kurdish (flag add to the list, ku_KU and ku used as code local and code). I tryed to add a third language Nederland, changing the image of nl, and then english, to see what happen and it doesn’t work too. I have the new language in admin but not in the site. I don’t have anymore the kurdish flag but translation is still functionning.
Can I come back to older version, or have you a solution for me ?
Thank you in advance,
Aurélie