Proper language name is `kk`, not `kz` as it was before

framework/messages/config.php

@@ -7,7 +7,7 @@ return [
     'messagePath' => __DIR__,
     // array, required, list of language codes that the extracted messages
     // should be translated to. For example, ['zh-CN', 'de'].
-    'languages' => ['ar', 'da', 'de', 'el', 'es', 'fa-IR', 'fi', 'fr', 'it', 'ja', 'kz', 'lv', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru', 'sk', 'sr', 'sr-Latn', 'uk', 'zh-CN'],
+    'languages' => ['ar', 'da', 'de', 'el', 'es', 'fa-IR', 'fi', 'fr', 'it', 'ja', 'kk', 'lv', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru', 'sk', 'sr', 'sr-Latn', 'uk', 'zh-CN'],
     // string, the name of the function for translating messages.
     // Defaults to 'Yii::t'. This is used as a mark to find the messages to be
     // translated. You may use a string for single function name or an array for