diff --git a/base.php b/base.php
index 30eeea4..a7dc7f5 100644
--- a/base.php
+++ b/base.php
@@ -59,7 +59,7 @@ APS
 );
 }
 
-define('LOCALE', isset($_GET['locale']) ? $_GET['locale'] : 'en');
+define('LOCALE', isset($_GET['locale']) ? $_GET['locale'] : (getenv('ESP_LANG') ?: 'en'));
 
 $_messages = require(__DIR__ . '/lang/' . LOCALE . '.php');
 $_pages = require(__DIR__ . '/_pages.php');
diff --git a/js/lang.js b/js/lang.js
index 429f1ac..41e5e9c 100644
--- a/js/lang.js
+++ b/js/lang.js
@@ -1,14 +1,14 @@
 // Generated from PHP locale file
 let _tr = {
-    "wifi.connected_ip_is": "Connected, IP is ",
-    "wifi.not_conn": "Not connected.",
-    "wifi.enter_passwd": "Enter password for \":ssid:\"",
-    "term_nav.fullscreen": "Fullscreen",
-    "term_conn.connecting": "Connecting",
-    "term_conn.waiting_content": "Waiting for content",
-    "term_conn.disconnected": "Disconnected",
-    "term_conn.waiting_server": "Waiting for server",
-    "term_conn.reconnecting": "Reconnecting"
+    "wifi.connected_ip_is": "Verbunden, IP ist ",
+    "wifi.not_conn": "Nicht verbunden.",
+    "wifi.enter_passwd": "Passwort für \":ssid:\"",
+    "term_nav.fullscreen": "Vollbild",
+    "term_conn.connecting": "Verbinden",
+    "term_conn.waiting_content": "Warten auf Inhalt",
+    "term_conn.disconnected": "Nicht verbunden",
+    "term_conn.waiting_server": "Warten auf Server",
+    "term_conn.reconnecting": "Verbinden"
 };
 
 module.exports = function tr (key) { return _tr[key] || '?' + key + '?' }