Déclarer le repo W :

apt update
apt install ca-certificates curl
curl -fsSL http://apt.lanisys.fr/public.key -o /etc/apt/keyrings/wlanguage.gpg
tee /etc/apt/sources.list.d/wlanguage.sources <<EOF
Types: deb
URIs: http://apt.lanisys.fr
Suites: $(. /etc/os-release && echo "$VERSION_CODENAME")
Components: main
Signed-By: /etc/apt/keyrings/wlanguage.gpg
EOF
apt update

Installer W :

apt install wlanguage