diff --git a/modules/system/lang/lv/lang.php b/modules/system/lang/lv/lang.php
index 0f1e6b35c..74b6306af 100644
--- a/modules/system/lang/lv/lang.php
+++ b/modules/system/lang/lv/lang.php
@@ -154,7 +154,7 @@ return [
         'mailgun_secret_comment' => 'Ievadiet savu Mailgun API kodu.',
         'mandrill' => 'Mandrill',
         'mandrill_secret' => 'Mandrill Secret',
-        'mandrill_secret_comment' => 'Ievadiet savu Mandrill API kodu.'
+        'mandrill_secret_comment' => 'Ievadiet savu Mandrill API kodu.',
         'drivers_hint_header' => 'Dziņi nav instalēti',
         'drivers_hint_content' => 'Šai pasta metodei nepieciešams spraudnis ":plugin" instalējiet to pirms pasta sūtīšanas.'
     ],
diff --git a/tests/unit/system/classes/TranslatorTest.php b/tests/unit/system/classes/TranslatorTest.php
index c877106a8..494bd49f5 100644
--- a/tests/unit/system/classes/TranslatorTest.php
+++ b/tests/unit/system/classes/TranslatorTest.php
@@ -20,4 +20,27 @@ class TranslatorTest extends TestCase
         $this->assertCount(1, $messages);
         $this->assertEquals('The name must be at least 5 characters.', $messages->all()[0]);
     }
+
+    public function testValidCoreLanguageFiles()
+    {
+        $translator = $this->app['translator'];
+        $locales = $translator->get('system::lang.locale');
+        $this->assertNotEmpty($locales);
+
+        $locales = array_keys($locales);
+        $modules = ['system', 'backend', 'cms'];
+        $files = ['lang.php', 'validation.php', 'client.php'];
+
+        foreach ($modules as $module) {
+            foreach ($locales as $locale) {
+                foreach ($files as $file) {
+                    $srcPath = base_path() . '/modules/'.$module.'/lang/'.$locale.'/'.$file;
+                    if (!file_exists($srcPath)) continue;
+                    $messages = require $srcPath;
+                    $this->assertNotEmpty($messages);
+                    $this->assertNotCount(0, $messages);
+                }
+            }
+        }
+    }
 }
\ No newline at end of file