In GNOME, language can't be changed with the default shell ash

On Alpine 3.17.3, when using GNOME with lang packages installed and the default shell /bin/ash, changing the user language through the GNOME panel won't make any change (after a log out of course), no error are shown.

Changing the user shell to /bin/bash makes GNOME happy in some way and language change is applied.

Changing back to /bin/ash makes GNOME in English again.

In order to reproduce:

• setup-alpine
• setup-desktop gnome
• apk add lang
• In GNOME Panel, pick a non English language (French for me)
• Log out (GNOME panel will provide a button) and log back
• GNOME should still be in English
• run usermod -s /bin/bash $user and log out / log in again
• GNOME should be in the other Language

Although, if you edit /etc/profile.d/locale.sh to add your locale, GNOME will apply the language of the locale even with /bin/ash as a shell, and won't care about the setting you've put in the panel. If I set fr_FR.UTF-8 in my locale and put GNOME in Spanish, it will be in French.

CC @team/gnome