diff --git a/RELEASE-NOTES b/RELEASE-NOTES
index 5bc50e16291..94220048a53 100644
--- a/RELEASE-NOTES
+++ b/RELEASE-NOTES
@@ -91,6 +91,7 @@ PHP if you have not done so prior to upgrading MediaWiki.
 * (bug 26217) File size is now checked before uploading in HTML5 browsers
 * CSS stylesheet MediaWiki:Noscript.css is now loaded for users with JavaScript
   disabled (enclosed in the head in a <noscript> tag)
+* Added UserGetLanguageObject hook to change the language used in $wgLang
 
 === Bug fixes in 1.18 ===
 * (bug 23119) WikiError class and subclasses are now marked as deprecated
diff --git a/docs/hooks.txt b/docs/hooks.txt
index 3aefd0338b1..a3705fb064d 100644
--- a/docs/hooks.txt
+++ b/docs/hooks.txt
@@ -1818,6 +1818,10 @@ $user: User object
 'UserGetImplicitGroups': Called in User::getImplicitGroups()
 &$groups: List of implicit (automatically-assigned) groups
 
+'UserGetLanguageObject': Called when getting user's interface language object
+$user: User object
+&$code: Langauge code that will be used to create the object
+
 'UserGetReservedNames': allows to modify $wgReservedUsernames at run time
 &$reservedUsernames: $wgReservedUsernames
 
diff --git a/includes/StubObject.php b/includes/StubObject.php
index 96551f36a5d..d1055e10f50 100644
--- a/includes/StubObject.php
+++ b/includes/StubObject.php
@@ -157,6 +157,8 @@ class StubUserLang extends StubObject {
 			$code = $wgLanguageCode;
 		}
 
+		wfRunHooks( 'UserGetLanguageObject', array( $wgUser, &$code ) );
+
 		if( $code === $wgLanguageCode ) {
 			return $wgContLang;
 		} else {