diff --git a/conf/config-domain.php b/conf/config-domain.php
index 23b0ebc..7ea0f92 100644
--- a/conf/config-domain.php
+++ b/conf/config-domain.php
@@ -21,8 +21,6 @@ $CFG->wwwroot   = 'https://__DOMAIN__';
 $CFG->dataroot  = '__DATA_PATH__';
 $CFG->admin = 'admin';
 
-$CFG->lang = '__LANGUAGE__';
-
 $CFG->directorypermissions = 02777;
 
 require_once(__DIR__ . '/lib/setup.php'); // Do not edit
diff --git a/conf/config-path.php b/conf/config-path.php
index 832f944..768e7d0 100644
--- a/conf/config-path.php
+++ b/conf/config-path.php
@@ -21,8 +21,6 @@ $CFG->wwwroot   = 'https://__DOMAIN____PATH__';
 $CFG->dataroot  = '__DATA_PATH__';
 $CFG->admin = 'admin';
 
-$CFG->lang = '__LANGUAGE__';
-
 $CFG->directorypermissions = 02777;
 
 require_once(__DIR__ . '/lib/setup.php'); // Do not edit
diff --git a/manifest.json b/manifest.json
index e75157e..886521c 100644
--- a/manifest.json
+++ b/manifest.json
@@ -58,16 +58,6 @@
                 "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": ["fr", "en"],
-                "default": "fr"
             }
         ]
     }
diff --git a/scripts/upgrade b/scripts/upgrade
index 56cb4c8..c15d324 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -22,7 +22,6 @@ admin=$(ynh_app_setting_get --app=$app --key=admin)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 data_path=$(ynh_app_setting_get --app=$app --key=data_path)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-language=$(ynh_app_setting_get --app=$app --key=language)
 site_name=$(ynh_app_setting_get --app=$app --key=site_name)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
 
@@ -77,12 +76,6 @@ if [ -z "$fpm_usage" ]; then
 	ynh_app_setting_set --app=$app --key=fpm_usage --value=$fpm_usage
 fi
 
-# If fpm_usage doesn't exist, create it
-if [ -z "$language" ]; then
-	language=en
-	ynh_app_setting_set --app=$app --key=language --value=$language
-fi
-
 # Cleaning legacy permissions
 if ynh_legacy_permissions_exists; then
 	ynh_legacy_permissions_delete_all