class Money::LocaleBackend::Legacy

def lookup(key, currency)
  warn '[DEPRECATION] You are using the default localization behaviour that will change in the next major release. Find out more - https://github.com/RubyMoney/money#deprecation'
  if Money.use_i18n
    i18n_backend.lookup(key, nil) || currency.public_send(key)
  else
    currency.public_send(key)
  end
end