diff --git a/conf/local-sample.config.php b/conf/local-sample.config.php
index ad05da0..882204e 100644
--- a/conf/local-sample.config.php
+++ b/conf/local-sample.config.php
@@ -39,6 +39,6 @@ return [
 	],
 	'system' => [
 		'default_timezone' => 'UTC',
-		'language' => 'en',
+		'language' => '__LANGUAGE__',
 	],
 ];
diff --git a/manifest.json b/manifest.json
index dd57e28..d402f65 100644
--- a/manifest.json
+++ b/manifest.json
@@ -45,6 +45,16 @@
           "name": "admin",
           "type": "user",
           "example": "johndoe"
+        },
+        {
+          "name": "language",
+          "type": "string",
+           "ask": {
+              "en": "Choose the application language",
+              "fr": "Choisissez la langue de l'application"
+          },
+           "choices": ["de", "en", "es", "fr", "it", "pt"],
+           "default": "en"
         }
       ]
     }
diff --git a/scripts/install b/scripts/install
index 759e8c4..94805b2 100644
--- a/scripts/install
+++ b/scripts/install
@@ -28,6 +28,7 @@ domain=$YNH_APP_ARG_DOMAIN
 path_url='/'
 admin=$YNH_APP_ARG_ADMIN
 email=$(ynh_user_get_info --username=$admin --key=mail)
+language=$YNH_APP_ARG_LANGUAGE
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -51,6 +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=$app --key=email --value=$email
+ynh_app_setting_set --app=$app --key=language --value=$language
 
 #=================================================
 # CREATE DEDICATED USER
diff --git a/scripts/upgrade b/scripts/upgrade
index 857fe66..5de0c3c 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -24,6 +24,7 @@ db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
 email=$(ynh_app_setting_get --app=$app --key=email)
 admin=$(ynh_app_setting_get --app=$app --key=admin)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+language=$(ynh_app_setting_get --app=$app --key=language)
 
 #=================================================
 # CHECK VERSION