bench/playbooks/roles/locale/tasks/main.yml

---
- name: Check current locale
  shell: localectl
  register: locale_test
  when: ansible_distribution == 'Centos' or ansible_distribution == 'Ubuntu'

- name: Set Locale
  command: "localectl set-locale LANG={{ locale_lang }}"
  when: (ansible_distribution == 'Centos' or ansible_distribution == 'Ubuntu') and locale_test.stdout.find('LANG=locale_lang') == -1

- name: Set keymap
  command: "localectl set-keymap {{ locale_keymap }}"
  when: "(ansible_distribution == 'Centos' or ansible_distribution == 'Ubuntu') and locale_test.stdout.find('Keymap:locale_keymap') == -1"

- name: Set Locale as en_US
  lineinfile: dest=/etc/environment backup=yes line="{{ item }}"
  with_items:
    - "LC_ALL=en_US.UTF-8"
    - "LC_CTYPE=en_US.UTF-8"
    - "LANG=en_US.UTF-8"
...