Merge "(bug 44595) LanguageTest::testIsSupportedLanguage fails on Windows"

diff --git a/languages/Language.php b/languages/Language.php
index dd2fef6..5538ac8 100644 (file)
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -254,7 +254,7 @@ class Language {
         * @since 1.21
         */
        public static function isSupportedLanguage( $code ) {
-               return is_readable( self::getMessagesFileName( $code ) );
+               return $code === strtolower( $code ) && is_readable( self::getMessagesFileName( $code ) );
        }
 
        /**