diff --git a/conf/temp.gsconfig.php b/conf/temp.gsconfig.php
index 5b25a12..bff157f 100644
--- a/conf/temp.gsconfig.php
+++ b/conf/temp.gsconfig.php
@@ -71,7 +71,7 @@ define('GSDONOTPING', 1);
 	
 # Set PHP locale
 # http://php.net/manual/en/function.setlocale.php
-etlocale(LC_ALL, 'en_US');
+etlocale(LC_ALL, '__LANGUAGE__');
 
 # Define default timezone of server, accepts php timezone string
 # valid timeszones can be found here http://www.php.net/manual/en/timezones.php
diff --git a/manifest.json b/manifest.json
index 72f66f5..9a18fae 100644
--- a/manifest.json
+++ b/manifest.json
@@ -44,6 +44,15 @@
                 "name": "is_public",
                 "type": "boolean",
                 "default": true
+            }            {
+                "name": "language",
+                "type": "string",
+                "ask": {
+                    "en": "Choose the application language",
+                    "fr": "Choisissez la langue de l'application"
+                },
+                "choices": ["de_DE", "fr_FR", "en_US", "nl_NL"],
+                "default": "fr_FR"
             }
         ]
     }
diff --git a/scripts/install b/scripts/install
index 0586710..5757c3f 100755
--- a/scripts/install
+++ b/scripts/install
@@ -27,7 +27,7 @@ ynh_abort_if_errors
 domain=$YNH_APP_ARG_DOMAIN
 path_url=$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
-language=en_US
+language=$YNH_APP_ARG_LANGUAGE
 timezone="$(cat /etc/timezone)"
 phpversion=$YNH_PHP_VERSION
 
@@ -102,12 +102,12 @@ ynh_add_fpm_config
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
-# ynh_script_progression --message="Adding a configuration file..." --weight=1
+ynh_script_progression --message="Adding a configuration file..." --weight=1
 
-# ynh_add_config --template="../conf/temp.gsconfig.php" --destination="$final_path/gsconfig.php"
+ynh_add_config --template="../conf/temp.gsconfig.php" --destination="$final_path/temp.gsconfig.php"
 
-# chmod 655 "$final_path/gsconfig.php"
-# chown $app:$app "$final_path/gsconfig.php"
+# chmod 655 "$final_path/temp.gsconfig.php"
+# chown $app:$app "$final_path/temp.gsconfig.php"
 
 #=================================================
 # SETUP SSOWAT