Fix the localectl syntax.

defaults/main.yml

@@ -1,12 +1,16 @@
 ---
 # timezone
 timezone: 'Europe/Rome'
-default_locale: "en_US.UTF-8"
+default_locale_lang: "en_US.UTF-8"
+default_locale_messages: "C.UTF-8"
 locales_list:
   - { name: '{{ default_locale }}' }
+  - { name: 'en_US.UTF-8' }
   - { name: 'en_US' }
   - { name: 'it_IT.UTF-8' }
   - { name: 'it_IT' }
+  - { name: 'C.UTF-8' }
+  - { name: 'C' }
 
 enable_env_proxy: False
 env_proxy_http_host: 'localhost'

tasks/locale.yml

@@ -10,7 +10,7 @@
 
 - block:
     - name: Set the default locale on Trusty
-      shell: update-locale LANG={{ default_locale }}
+      shell: update-locale LANG={{ default_locale_lang }}
 
   when: ansible_distribution_release == "trusty"
   tags: [ 'systemsetup', 'locale' ]
@@ -22,7 +22,10 @@
       register: localectl_executable
 
     - name: Set the default locale
-      command: localectl set-locale {{ default_locale }}
+      command: localectl set-locale "{{ item }}"
+      with_items:
+        - 'LANG={{ default_locale_lang }}'
+        - 'LC_MESSAGES={{ default_locale_messages }}'
       when: localectl_executable.stat.exists | bool
 
   tags: [ 'systemsetup', 'locale' ]