Did you ever wonder what your Rails i18n is doing? Why your translation isn't found? Add this initializer to log every i18n translation as it happens.

i18n.rb

I18n::Backend::Base.class_eval do
  def translate_with_logging(locale, key, options = {})
    Rails.logger.debug "    i18n: #{locale} #{key} #{options.inspect}"
    translate_without_logging(locale, key, options)
  end

  alias_method_chain :translate, :logging
end