diff --git a/scripts/upgrade b/scripts/upgrade
index 80d9348..a12013b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -45,13 +45,19 @@ if [ -z "$final_path" ]; then
 	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 fi
 
+# If language doesn't exist, create it
+if [ -z "$language" ]; then
+	language="en"
+	ynh_app_setting_set --app=$app --key=language --value=$language
+fi
+
 case "$language" in
 	Francais)
-		lang="fr"
+		language="fr"
 		ynh_app_setting_set --app=$app --key=language --value=$language
 		;;
 	English)
-		lang="en"
+		language="en"
 		ynh_app_setting_set --app=$app --key=language --value=$language
 		;;
 	*)