diff --git a/lib/plugins/authad/lang/de/lang.php b/lib/plugins/authad/lang/de/lang.php
new file mode 100644
index 0000000000000000000000000000000000000000..3f275750c7526fb582d776e4b4f4f1e143481857
--- /dev/null
+++ b/lib/plugins/authad/lang/de/lang.php
@@ -0,0 +1,10 @@
+<?php
+/**
+ * German language file for addomain plugin
+ *
+ * @author Andreas Gohr <gohr@cosmocode.de>
+ */
+
+$lang['domain'] = 'Anmelde-Domäne';
+
+//Setup VIM: ex: et ts=4 :
diff --git a/lib/plugins/authad/lang/en/lang.php b/lib/plugins/authad/lang/en/lang.php
new file mode 100644
index 0000000000000000000000000000000000000000..e2967d662d254081f5f9d2c081b8a04e1d6cd730
--- /dev/null
+++ b/lib/plugins/authad/lang/en/lang.php
@@ -0,0 +1,10 @@
+<?php
+/**
+ * English language file for addomain plugin
+ *
+ * @author Andreas Gohr <gohr@cosmocode.de>
+ */
+
+$lang['domain'] = 'Logon Domain';
+
+//Setup VIM: ex: et ts=4 :
diff --git a/lib/plugins/authad/lang/ko/lang.php b/lib/plugins/authad/lang/ko/lang.php
new file mode 100644
index 0000000000000000000000000000000000000000..1aa436708df72cdd246bd195ebde60edf02d0946
--- /dev/null
+++ b/lib/plugins/authad/lang/ko/lang.php
@@ -0,0 +1,10 @@
+<?php
+/**
+ * Korean language file for addomain plugin
+ *
+ * @author Myeongjin <aranet100@gmail.com>
+ */
+
+$lang['domain'] = '로그온 도메인';
+
+//Setup VIM: ex: et ts=4 :