[wp-trac] [WordPress Trac] #26511: Separate locale for the admin toolbar

[WordPress Trac]

#26511: Separate locale for the admin toolbar
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 Reporter:  johnbillion      |       Owner:
     Type:  feature request  |      Status:  new
 Priority:  normal           |   Milestone:  Awaiting Review
Component:  I18N             |     Version:
 Severity:  normal           |  Resolution:
 Keywords:                   |
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Comment (by nacin):

 A locale-switching function would be nice to have.

 I think this will be something core will need to look into once we start
 having an in-dashboard language chooser, whereby the pack for that
 language can be downloaded automatically on selection. At that point, the
 next logical step would be to allow a user to choose their dashboard
 language independently from the site's locale.

 In theory, this is easy to do. (See the Admin in English plugin.) In
 practice, it's akin to using the admin in SSL and the frontend using HTTP
 — core is surely doing something somewhere that causes whatever happens in
 the admin to trickle into the frontend (so, the equivalent of #15928), and
 we'll need to figure out those and patch things up.

 Anyway, a locale-switching function could be implemented along the lines
 of switch_to_blog(). As of right now it'd need to be just two things: a
 filter on 'locale' (there's also a $locale global, though YMMV in the
 future) followed by a call to load_default_textdomain(). Un-switching is a
 matter of unhooking the filter and re-calling load_default_textdomain().
 (YMMV due to [https://core.trac.wordpress.org/browser/trunk/src/wp-
 admin/includes/admin.php?rev=25001#L9 this]). That's expensive, though.
 For core to have this functionality, we should start storing loaded
 translations on a per-language basis, so as not to obliterate the object
 in memory, to allow for a switch-back when done without re-calling
 load_default_textdomain().

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Ticket URL: <http://core.trac.wordpress.org/ticket/26511#comment:1>
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