Secondary Language

Opensuse handles secondary languages and input much better than any other linux distro and it is very easy to install with one click in YAST.
However, one thing has alwasy confused me.
If I go to Yast and select a secondary language (Japanese)
It installs without problem and installs scim/skim
But it doesn’t just install the secondary language I selected for skim - it installs every single secondary language in skim.
Why is this?
Seems like a waste of disk space.