[wp-trac] [WordPress Trac] #58546: Warn if _load_textdomain_just_in_time() is used before init

[WordPress Trac]

#58546: Warn if _load_textdomain_just_in_time() is used before init
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 Reporter:  swissspidy   |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  I18N         |    Version:
 Severity:  normal       |   Keywords:  dev-feedback
  Focuses:               |
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 Whenever a translation function like `__()` is used for the first time
 with a specific domain, `_load_textdomain_just_in_time()` kicks in to load
 the plugin's/theme's translations automatically.

 This function calls `determine_locale()` to load the translations in the
 current user's locale if available.

 If the JIT loading happens before the current user is set, it will load
 the translations in the wrong locale.

 Such situations were previously reported in #43869 and #45235.

 What if we issued a `doing_it_wrong` warning within
 `_load_textdomain_just_in_time` for such cases? This would urge developers
 to fix their code to run at the right time.

 If a lot of plugins are currently doing it wrong though, that might cause
 a lot of noise.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58546>
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