From 1450bc4022428c311c868e5d806c210360865adf Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@netways.de>
Date: Mon, 23 May 2016 11:54:53 +0200
Subject: [PATCH] Show a warning if the chosen locale by the user is not
 available on the system

refs #11820
---
 application/forms/PreferenceForm.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/application/forms/PreferenceForm.php b/application/forms/PreferenceForm.php
index 10270f281..d2570545a 100644
--- a/application/forms/PreferenceForm.php
+++ b/application/forms/PreferenceForm.php
@@ -156,6 +156,16 @@ class PreferenceForm extends Form
      */
     public function createElements(array $formData)
     {
+        if (setlocale(LC_ALL, 0) === 'C') {
+            $this->warning(
+                $this->translate(
+                    'Your language setting is not applied because your platform is missing the corresponding locale.'
+                    . ' Make sure to install the correct language pack and restart your web server afterwards.'
+                ),
+                false
+            );
+        }
+
         if (! (bool) Config::app()->get('themes', 'disabled', false)) {
             $themes = Icinga::app()->getThemes();
             if (count($themes) > 1) {