module I18n::Backend::Simple::Implementation

def lookup(locale, key, scope = [], options = EMPTY_HASH)

%w(currency format).
into multiple keys, i.e. currency.format is regarded the same as
nested translations hash. Splits keys or scopes containing dots
either key is nil, or locale, scope or key do not exist as a key in the
Looks up a translation from the translations hash. Returns nil if 
def lookup(locale, key, scope = [], options = EMPTY_HASH)
  init_translations unless initialized?
  keys = I18n.normalize_keys(locale, key, scope, options[:separator])
  keys.inject(translations) do |result, _key|
    return nil unless result.is_a?(Hash)
    unless result.has_key?(_key)
      _key = _key.to_s.to_sym
      return nil unless result.has_key?(_key)
    end
    result = result[_key]
    result = resolve_entry(locale, _key, result, Utils.except(options.merge(:scope => nil), :count)) if result.is_a?(Symbol)
    result
  end
end