diff --git a/src/assets/translation/de.php b/src/assets/translation/de.php
index e06332e..7f91501 100644
--- a/src/assets/translation/de.php
+++ b/src/assets/translation/de.php
@@ -4,6 +4,10 @@
     'unitcodes' => [
     ],
     'documenttype' => [
+        '380' => 'Rechnung',
+        '381' => 'Gutschrift',
+        '384' => 'Rechnungskorrektur',
+        '386' => 'Vorauszahlungsrechnung',
     ],
     'generaltexts' => [
         'greeting' => 'Werter Kunde',
diff --git a/src/assets/translation/en.php b/src/assets/translation/en.php
index e5cd921..5c0d0fc 100644
--- a/src/assets/translation/en.php
+++ b/src/assets/translation/en.php
@@ -4,6 +4,10 @@
     'unitcodes' => [
     ],
     'documenttype' => [
+        '380' => 'Invoice',
+        '381' => 'Credit Note',
+        '384' => 'Corrected Invoice',
+        '386' => 'Prepayment Invoice',
     ],
     'generaltexts' => [
         'greeting' => 'Dear customer',