Define default input locale

roles/baseconfig/handlers/main.yml

@@ -0,0 +1,4 @@
+---
+# Reconfigure locales when conf changes
+- name: Reconfigure locales
+  command: dpkg-reconfigure locales -f noninteractive

roles/baseconfig/tasks/main.yml

@@ -43,6 +43,16 @@
     name: fr_FR.UTF-8
     state: present
 
+# Fix LC_CTYPE="C"
+- name: Select default locale
+  debconf:
+    name: locales
+    question: locales/default_environment_locale
+    value: fr_FR.UTF-8
+    vtype: select
+  notify:
+    - Reconfigure locales
+
 # Molly-Guard : prevent accidental shutdowns
 - include_tasks: molly-guard.yml