Comment # 4 on bug 957528 from Mindaugas Baranauskas

As described in
http://lists.opensuse.org/opensuse-translation/2015-11/msg00076.html , even
YaST > Language don't install appropriate *-lang packages.

Maybe it could be even 3:
1) installing *-lang via YaST > Language
2) complete language packages list in Software Manager
3) Software Manager option to install install recommended packages.

If mechanism to show list in Software Manager (2) would work, then (3) will not
be so important (you can just manually open that list and select to install all
packages). If mechanism for (1) and (2) is same, then YES, it is dublicate (as
view from 2); but then please convert this bug to (3).