diff --git a/manifest.toml b/manifest.toml
index 51ee49a..5ee0b32 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -40,7 +40,7 @@ ram.runtime = "50M"
     ask.en = "Choose the application language"
     ask.fr = "Choisissez la langue de l'application"
     type = "select"
-    choices = ["en-US", "fr-FR"]
+    choices = ["en", "fr-FR"]
     default = "fr-FR"
 
 [resources]
diff --git a/scripts/upgrade b/scripts/upgrade
index d153866..0ed8ea6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -80,7 +80,7 @@ if [ -z "${maxitemsperpage:-}" ]; then
 fi
 
 if [ -z "${language:-}" ]; then
-	language="en-US"
+	language="en"
 	ynh_app_setting_set --app=$app --key=language --value=$language
 fi