vim.eclass or vim-core may want to install locales and menu translations (/usr/share/vim/vim73/lang/**) according to LINGUAS, not in all languages possible.
Feel free to provide a patch since this isn't high priority.
Personally I'd rather wait until a decent tree-wide solution at a pkg manager or eclass level is in place.
*** Bug 469410 has been marked as a duplicate of this bug. ***
The problem persists with Vim 7.4 .
Other packages have been fixed ; hopefully, Vim can be too.
Sorry for the split message : in case it helps,
the spurious languages installed are FR IT JA PL .
I think it needs to be closed as WONTFIX.