I installed Kubuntu 16.04 in Dutch. When starting the first time I got the message "can not start Plasma 5". I found a solution in Kubuntu 16.04 Plasma can not start after fresh install There it is said:
The problem seems to be that the Dutch translations (kde-l10n-nl) of KDE conflicts with plasma-desktop. Forcing the reinstallation of plasma-desktop in a TTY fixed the issue
But now I receive messages saying that the languages support is incomplete and that supplementary packages must be installed. When I allow the installation, then it always fails. The last message I see in a flash is something as "problems with dependencies". Is it dangerous to work with the Dutch translations? How can I get them right without having interferences with the rest?
Kubuntu 1604 on ASUS laptop X756UB with dual boot.