diff --git a/manifest.toml b/manifest.toml
index ccafb8e..6be1dc1 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -52,8 +52,8 @@ ram.runtime = "512M"
     ask.en = "Choose the application language"
     ask.fr = "Choisissez la langue de l'application"
     type = "select"
-    choices = ["en-US", "es-ES", "it-IT", "fr-FR"]
-    default = "en-US"
+    choices = ["en_US", "es_ES", "it_IT", "fr_FR", "de_DE"]
+    default = "en_US"
 
     [install.user_home]
     ask.en = "Access the users home folder from Nextcloud?"