diff --git a/cp/bootstrap/app.php b/cp/bootstrap/app.php
index cd194ee..3dc4517 100644
--- a/cp/bootstrap/app.php
+++ b/cp/bootstrap/app.php
@@ -99,12 +99,12 @@ $container->set('view', function ($container) {
                 $uiLang = strtolower($parts[1]);
             }
         } else {
-            $desiredLanguage = 'en_US';
-            $uiLang = 'us';
+            $desiredLanguage = envi('LANG');
+            $uiLang = envi('UI_LANG');
         }
     } else {
-        $desiredLanguage = 'en_US';
-        $uiLang = 'us';
+        $desiredLanguage = envi('LANG');
+        $uiLang = envi('UI_LANG');
     }
     $lang_full = Language::getName($desiredLanguage, 'en');
     $lang = trim(strstr($lang_full, ' (', true));
diff --git a/cp/env-sample b/cp/env-sample
index 957b270..2a9394b 100644
--- a/cp/env-sample
+++ b/cp/env-sample
@@ -5,6 +5,9 @@ APP_DOMAIN=example.com
 APP_ROOT=/var/www/cp
 MINIMUM_DATA=false
 
+LANG=en_US
+UI_LANG=us
+
 DB_DRIVER=mysql
 DB_HOST=localhost
 DB_DATABASE=registry