Merge "Revert "Remove invalid language code "bh" (alias of "bho")""

RELEASE-NOTES-1.26

@@ -37,9 +37,6 @@ MediaWiki supports over 350 languages. Many localisations are updated
 regularly. Below only new and removed languages are listed, as well as
 changes to languages because of Bugzilla reports.
 
-* BREAKING CHANGE (T91240): Language code "bh" is not valid in ISO 639 and
-  was removed, so it will no longer alias to "bho". If you used "bh" as your
-  wiki's $wgLanguageCode, you must update your configuration.
 
 === Other changes in 1.26 ===
 * ChangeTags::tagDescription() will return false if the interface message

languages/Names.php

@@ -78,6 +78,7 @@
 	'be-x-old' => "беларуская (тарашкевіца)\xE2\x80\x8E",	# (be-tarask compat)
 	'bg' => 'български',	# Bulgarian
 	'bgn' => 'بلوچی رخشانی', # Western Balochi
+	'bh' => 'भोजपुरी',	# Bihari macro language. Falls back to Bhojpuri (bho)
 	'bho' => 'भोजपुरी',	# Bhojpuri
 	'bi' => 'Bislama',		# Bislama
 	'bjn' => 'Bahasa Banjar',	# Banjarese

languages/messages/MessagesBh.php

@@ -0,0 +1,12 @@
+<?php
+/** Bihari (भोजपुरी)
+ *
+ * To improve a translation please visit https://translatewiki.net
+ *
+ * @ingroup Language
+ * @file
+ *
+ */
+
+$fallback = 'bho';
+