A memo on how to implement internationalization (i18n) for state_machine.

・pluginaweek/state_machine · GitHub

■ config/locales/model.ja.yml

ja:
  activerecord:
    state_machines:
      order:
        state:
          states:
            accepted: 注文受付
            firmed: 注文確定
            cancelled: 注文キャンセル
            delivered: 発送完了
          events:
            accept: 注文
            cancel: キャンセル
            deliver: 発送
    errors:
      models:
        order:
          attributes:
            state:
              invalid_transition: "%{value}状態では%{event}処理はできません。"

Then use it with human_state_name.

o.human_state_name
# => "発送完了"

【Reference】

・I18n documentation is missing · Issue #114 · pluginaweek/state_machine

That’s all from the Gemba.