container-toolbox: Install all languages
    
    The Container/Dockerfile equivalent of the fedora-toolbox OCI images
    installed all languages by removing %_install_langs (set to en_US by the
    fedora base image) from /etc/rpm/macros.image-language-conf [1].  The
    Kickstart does the same in the %pre section.
    
    Therefore, it's self-contradictory to have '%packages --inst-langs=en'.
    
    The fedora-toolbox OCI image is meant for interactive command line
    environments, not for deploying server applications.  Therefore, they
    need a fully featured CLI user experience at par with what's offered on
    Fedora Silverblue and Workstation.  Among the Kickstart files defined
    here, other than fedora-container-toolbox.ks, only these ones don't
    install all languages:
      * fedora-cloud-base.ks
      * fedora-container-base-minimal.ks
      * fedora-container-base.ks
      * fedora-container-common.ks
      * fedora-eln-container-base.ks
      * fedora-server-vm-full.ks
    
    All the other Kickstarts, and definitely those for Fedora Workstation,
    install all languages.
    
    [1] https://src.fedoraproject.org/container/fedora-toolbox
        https://github.com/containers/toolbox/tree/main/images/fedora
    
    https://bugzilla.redhat.com/show_bug.cgi?id=2244503
    https://pagure.io/fedora-kickstarts/pull-request/997