diff --git a/check_process b/check_process
index fec9a17..96d0daf 100644
--- a/check_process
+++ b/check_process
@@ -4,6 +4,7 @@
 		path="/path"
         admin="john"
         is_public=1
+        language="fr"
     ; Checks
         pkg_linter=1
 		setup_sub_dir=1
diff --git a/conf/.env b/conf/.env
index 5161efb..c360ae8 100644
--- a/conf/.env
+++ b/conf/.env
@@ -18,7 +18,7 @@ APP_KEY=__RANDOM_KEY__
 # For a list of available languages: https://github.com/firefly-iii/firefly-iii/tree/main/resources/lang
 #
 # If text is still in English, remember that not everything may have been translated.
-DEFAULT_LANGUAGE=en_US
+DEFAULT_LANGUAGE=__LANGUAGE__
 
 # The locale defines how numbers are formatted.
 # by default this value is the same as whatever the language is.
diff --git a/manifest.json b/manifest.json
index 3f205d2..50a1bae 100644
--- a/manifest.json
+++ b/manifest.json
@@ -27,7 +27,7 @@
     "multi_instance": true,
     "services": [
         "nginx",
-        "php7.4-fpm",
+        "php8.0-fpm",
         "mysql"
     ],
     "arguments": {
@@ -46,6 +46,16 @@
                 "name": "admin",
                 "type": "user"
             },
+            {
+                "name": "language",
+                "type": "string",
+                "ask": {
+                    "en": "Choose the application language",
+                    "fr": "Choisissez la langue de l'application"
+                },
+                "choices": ["de", "fr", "en_US"],
+                "default": "fr"
+            },
             {
                 "name": "is_public",
                 "type": "boolean",
diff --git a/scripts/install b/scripts/install
index 310451b..6211351 100755
--- a/scripts/install
+++ b/scripts/install
@@ -24,8 +24,10 @@ domain=$YNH_APP_ARG_DOMAIN
 path_url=$YNH_APP_ARG_PATH
 admin=$YNH_APP_ARG_ADMIN
 is_public=$YNH_APP_ARG_IS_PUBLIC
+language=$YNH_APP_ARG_LANGUAGE
 random_key=$(ynh_string_random --length=32)
 email=$(ynh_user_get_info --username=$admin --key=mail)
+timezone="$(cat /etc/timezone)"
 phpversion=$YNH_PHP_VERSION
 
 app=$YNH_APP_INSTANCE_NAME
@@ -50,7 +52,7 @@ ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
 ynh_app_setting_set --app=$app --key=admin --value=$admin
 ynh_app_setting_set --app=$app --key=random_key --value=$random_key
-ynh_app_setting_set --app=$app --key=phpversion --value=$phpversion
+ynh_app_setting_set --app=$app --key=language --value=$language
 
 #=================================================
 # INSTALL DEPENDENCIES