[wp-trac] [WordPress Trac] #49625: load_theme_textdomain() opens local files without domain in their name

[WordPress Trac]

#49625: load_theme_textdomain() opens local files without domain in their name
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 Reporter:  marekdedic    |      Owner:  (none)
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  I18N          |    Version:  5.3.2
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Hi,

 I am developing a theme called `crdm-modern` and want to add translations
 for the language `cs_CZ`. I want to load local `.mo` files as the
 translations. In order to do that, I placed a file called `crdm-modern-
 cs_CZ.mo` in the theme in the `languages` folder. I tried to use this by
 calling `load_theme_textdomain( 'crdm-modern', get_stylesheet_directory()
 . '/languages' )`. However this failed.

 Looking at the source of the function `load_theme_textdomain()`
 [https://developer.wordpress.org/reference/functions/load_theme_textdomain/],
 I see the following line:

 `return load_textdomain( $domain, $path . '/' . $locale . '.mo' );`

 So this would load the file `languages/cs_CZ.mo`. I think this is a bug
 and it should instead try to load the file `languages/crdm-modern-
 cs_CZ.mo`. This would be in line with how the function
 `load_plugin_textdomain()` works - that's wha I think it is a bug.

 Looking at the code, I think the issue was introduced in
 [https://core.trac.wordpress.org/changeset/37414] and could be solved by
 replacing

 `return load_textdomain( $domain, $path . '/' . $locale . '.mo' );`

 with

 `return load_textdomain( $domain, $path . '/' . $mofile );`

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Ticket URL: <https://core.trac.wordpress.org/ticket/49625>
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