diff --git a/conf/config.inc.php b/conf/config.inc.php
index ce67075..4e016d3 100644
--- a/conf/config.inc.php
+++ b/conf/config.inc.php
@@ -99,6 +99,18 @@ $config['des_key'] = '__DESKEY__';
 // skin name: folder from skins/
 $config['skin'] = 'elastic';
 
+// ----------------------------------
+// USER INTERFACE
+// ----------------------------------
+
+// the default locale setting (leave empty for auto-detection)
+// RFC1766 formatted language name like en_US, de_DE, de_CH, fr_FR, pt_BR
+$config['language'] = __LANGUAGE__;
+
+// use this format for date display (date or strftime format)
+$config['date_format'] = 'd-m-Y';
+
+
 // Enable YunoHost users search in the address book.
 $config['ldap_public']['yunohost'] = array(
   'name' => 'YunoHost Users',
diff --git a/manifest.json b/manifest.json
index 5e2bbf3..8f9df9f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -43,6 +43,16 @@
                 "example": "/webmail",
                 "default": "/webmail"
             },
+            {
+                "name": "language",
+                "type": "string",
+                "ask": {
+                    "en": "Choose the application language",
+                    "fr": "Choisissez la langue de l'application"
+                },
+                "choices": ["fr_FR", "en-GB"],
+                "default": "fr_FR"
+            },
             {
                 "name": "with_carddav",
                 "type": "boolean",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index d78a2c0..93a1c93 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -7,7 +7,7 @@
 YNH_PHP_VERSION="7.3"
 
 # Package dependencies
-extra_php_dependencies="php${YNH_PHP_VERSION}-cli php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-dom php${YNH_PHP_VERSION}-curl"
+extra_php_dependencies="php-pear php${YNH_PHP_VERSION}-ldap php${YNH_PHP_VERSION}-mysql php${YNH_PHP_VERSION}-cli php${YNH_PHP_VERSION}-intl php${YNH_PHP_VERSION}-json php${YNH_PHP_VERSION}-zip php${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-mbstring php${YNH_PHP_VERSION}-dom php${YNH_PHP_VERSION}-curl"
 
 # Plugins version
 contextmenu_version=2.3
diff --git a/scripts/install b/scripts/install
index b4b376e..c96f525 100644
--- a/scripts/install
+++ b/scripts/install
@@ -24,6 +24,7 @@ domain=$YNH_APP_ARG_DOMAIN
 path_url=$YNH_APP_ARG_PATH
 with_carddav=$YNH_APP_ARG_WITH_CARDDAV
 with_enigma=$YNH_APP_ARG_WITH_ENIGMA
+language=$YNH_APP_ARG_LANGUAGE
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -47,6 +48,7 @@ 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=$app --key=with_carddav --value=$with_carddav
 ynh_app_setting_set --app=$app --key=with_enigma --value=$with_enigma
+ynh_app_setting_set --app=$app --key=language --value=$language
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -127,6 +129,7 @@ ynh_replace_string --match_string="__DESKEY__" --replace_string="$(ynh_string_ra
 ynh_replace_string --match_string="__DBUSER__" --replace_string="$db_name" --target_file="$rc_conf"
 ynh_replace_string --match_string="__DBPASS__" --replace_string="$db_pwd" --target_file="$rc_conf"
 ynh_replace_string --match_string="__DBNAME__" --replace_string="$db_name" --target_file="$rc_conf"
+ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$rc_conf"
 
 #=================================================
 # INSTALL ADDITIONAL PLUGINS
diff --git a/scripts/restore b/scripts/restore
index c9d43eb..a7cd2b5 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -77,7 +77,7 @@ chown -R $app: "$final_path/"{temp,logs,plugins/enigma/home}
 
 ynh_restore_file --origin_path="/etc/php/$phpversion/fpm/pool.d/$app.conf"
 
-ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION --package="$extra_php_dependencies"
+ynh_add_fpm_config --package="$extra_php_dependencies"
 
 #=================================================
 # SPECIFIC RESTORATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 0e49d0a..3a6f394 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -23,6 +23,7 @@ db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 with_carddav=$(ynh_app_setting_get --app=$app --key=with_carddav)
 with_enigma=$(ynh_app_setting_get --app=$app --key=with_enigma)
 phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
+language=$(ynh_app_setting_get --app=$app --key=language)
 
 #=================================================
 # CHECK VERSION
@@ -129,7 +130,7 @@ ynh_system_user_create --username=$app
 ynh_script_progression --message="Upgrading PHP-FPM configuration..." --weight=5
 
 # Create a dedicated PHP-FPM config
-ynh_add_fpm_config --phpversion=$YNH_PHP_VERSION --package="$extra_php_dependencies"
+ynh_add_fpm_config --package="$extra_php_dependencies"
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -153,6 +154,7 @@ then
     db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
     ynh_replace_string --match_string="__DBPASS__" --replace_string="$db_pwd" --target_file="$rc_conf"
     ynh_replace_string --match_string="__DBNAME__" --replace_string="$db_name" --target_file="$rc_conf"
+    ynh_replace_string --match_string="__LANGUAGE__" --replace_string="$language" --target_file="$rc_conf"
 
     #=================================================
     # UPDATE DEPENDENCIES WITH COMPOSER