On Thursday, 30 April 2020 16:15:54 BST Dale wrote:
> Dr Rainer Woitok wrote:
> > Greetings,
> > 
> > On Thursday, 2020-04-30 07:31:51 -0500, Dale wrote:
> >> ...
> >> [ebuild   R    ] app-doc/gimp-help-2.8.2:2::gentoo  0 KiB
> > 
> > Thanks for pointing me to a package I hadn't yet installed,  even though
> > I have installed "media-gfx/gimp" (but use it rarely).  But installation
> > took surprisingly long  because it included tons of messages in unneeded
> > laguages.   I have  L10N="en-GB"  in my "make.conf" file,  but this only
> > seems to request additional languages.
> > 
> > Is there a way to exclude megabytes  of message texts or manual pages in
> > languages I don't understand anyway from being installed, something like
> > "L10N="-* en-GB"?   And is there a way to again remove unnecessary lang-
> > uages after they have been installed?
> > 
> > Under Ubuntu I used to use a package named "localepurge" which did both.
> > 
> > Sincerely,
> > 
> >   Rainer
> 
> These settings are from AGES ago.  I think they are still in use tho. 
> 
> 
> root@fireball / # cat /etc/make.conf | grep lang
> LANG="en_US"
> root@fireball / # cat /etc/make.conf | grep L10N
> L10N="en en-US"
> root@fireball / #
> 
> 
> You would replace US with GB of course.  Oh, I put a link from
> /etc/make.conf to the real one.  I'm used to the old location. :/ 
> 
> That help? 
> 
> Dale
> 
> :-)  :-) 

Unless this page is out of date L10N USE expansion variable can be set either 
at make.conf, or on a per package basis:

https://wiki.gentoo.org/wiki/Localization/Guide#L10N

Meanwhile, I think the equivalent to debian's localepurge corresponds to a 
dual step process in Gentoo.  First update your locale as per above page, then 
run 'env-update && source /etc/profile', followed by 'localegen'.  Then if you 
have also setup additional localisations in L10N, you need to run emerge with 
option --newuse, or --changeduse to take account per package or global changes 
in the L10N USE settings.

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