diff --git a/src/includes/functions.inc.php b/src/includes/functions.inc.php
index 2c9fc670..b9d42884 100644
--- a/src/includes/functions.inc.php
+++ b/src/includes/functions.inc.php
@@ -73,8 +73,9 @@ function psm_load_lang($lang) {
 	}
 
 	require $lang_file;
-	$locale = basename($lang_file, '.lang.php');
-	setlocale(LC_TIME, $locale);
+	if(isset($sm_lang['locale'])) {
+		setlocale(LC_TIME, $sm_lang['locale']);
+	}
 
 	$GLOBALS['sm_lang'] = $sm_lang;
 }
diff --git a/src/lang/bg_BG.lang.php b/src/lang/bg_BG.lang.php
index b12143f8..62aa1745 100644
--- a/src/lang/bg_BG.lang.php
+++ b/src/lang/bg_BG.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'Български - Bulgarian',
+	'locale' => array('bg_BG.UTF-8', 'bg_BG', 'bulgarian'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Инсталация',
diff --git a/src/lang/de_DE.lang.php b/src/lang/de_DE.lang.php
index 06dba025..76525c8b 100644
--- a/src/lang/de_DE.lang.php
+++ b/src/lang/de_DE.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'Deutsch - German',
+	'locale' => array('de_DE.UTF-8', 'de_DE', 'german'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Install',
diff --git a/src/lang/en_US.lang.php b/src/lang/en_US.lang.php
index 974b4b69..a5d11fac 100644
--- a/src/lang/en_US.lang.php
+++ b/src/lang/en_US.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'English',
+	'locale' => array('en_US.UTF-8', 'en_US', 'american', 'english-us'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Install',
diff --git a/src/lang/fr_FR.lang.php b/src/lang/fr_FR.lang.php
index 445f3b4d..644d303f 100644
--- a/src/lang/fr_FR.lang.php
+++ b/src/lang/fr_FR.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'Français - French',
+	'locale' => array('fr_FR.UTF-8', 'fr_FR', 'french'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Installer',
diff --git a/src/lang/ko_KR.lang.php b/src/lang/ko_KR.lang.php
index beb1d2b7..19347ade 100644
--- a/src/lang/ko_KR.lang.php
+++ b/src/lang/ko_KR.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => '한국 - Korean',
+	'locale' => array('ko_KR.UTF-8', 'ko_KR', 'korean'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Install',
diff --git a/src/lang/nl_NL.lang.php b/src/lang/nl_NL.lang.php
index ce10bcec..6b4c288a 100644
--- a/src/lang/nl_NL.lang.php
+++ b/src/lang/nl_NL.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'Nederlands - Dutch',
+	'locale' => array('nl_NL.UTF-8', 'nl_NL', 'dutch'),
 	'system' => array(
 		'title' => 'Server Monitor',
 		'install' => 'Install',
diff --git a/src/lang/pt_BR.lang.php b/src/lang/pt_BR.lang.php
index 31647918..fb25bd6e 100644
--- a/src/lang/pt_BR.lang.php
+++ b/src/lang/pt_BR.lang.php
@@ -27,6 +27,7 @@
 
 $sm_lang = array(
 	'name' => 'Português - Brazilian portuguese',
+	'locale' => array('pt_BR.UTF-8', 'pt_BR', 'portuguese-brazilian'),
     'system' => array(
         'title' => 'Server Monitor',
 		'install' => 'Install',