[wp-trac] [WordPress Trac] #28793: WPLANG interferes with the interface language whilst installing

[WordPress Trac]

#28793: WPLANG interferes with the interface language whilst installing
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 Reporter:  johnbillion   |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  4.0
Component:  I18N          |    Version:  trunk
 Severity:  normal        |   Keywords:  needs-patch
  Focuses:                |
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 Steps to reproduce:

  * Set a language in the `WPLANG` constant in `wp-config.php` and ensure
 you have the language pack installed for that language
  * Go through the installation procedure, but select a different language
 on the language selection screen.
  * Note that the language in WPLANG is used in the interface, instead of
 the language you selected.

 I've narrowed this down to the `load_textdomain()` calls in
 `wp_install_load_language()` which aren't having any effect.

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Ticket URL: <https://core.trac.wordpress.org/ticket/28793>
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