I18n::ExtraTranslations

Find missing and extra translations in an application.

Add this line to your application's Gemfile:

gem 'i18n-extra_translations', require: false

And then execute:

$ bundle

Or install it yourself as:

$ gem install i18n-extra_translations

The library includes a Rack-compatible class that allows you to see the missing keys.

In your config/routes.rb file or in your config.ru add something like this:

if Rails.env == 'development'
  require 'i18n/extra_translations'
  mount I18n::ExtraTranslations::Server.new => '/i18n'
end

After this, check the path /i18n to see the missed keys.

Add this code, or something close, to your (test|spec)_helper.rb :

require 'i18n/extra_translations'
at_exit do
  require 'awesome_print'
  puts 'Missing translations:'
  ap I18n::ExtraTranslations.missing_translations
  puts 'Unused translations:'
  ap I18n::ExtraTranslations.unused_translations
end

By default extra_translations focuses on the default locale only. It means that any other locale will not be used for both missing and unused translations. You can set the locale to use with the following code:

I18n::ExtraTranslations.locale = :fr

By default the file used to find unused translations is "./config/locales/#{locale}.yml" where locale is the reference locale. You can pass a list of filepaths to look when you call I18n::ExtraTranslations.unused_translations:

locale_filepaths = ['./config/locales/en.yml', './config/locales/attributes.en.yml']
I18n::ExtraTranslations.unused_translations(locale_filepaths)

This gem is heavily inspired by Sven Fuchs's missing_translation gem.

There also i18n_tools that do the same kind of stuff that this gem with a different approach. While this gem hooks on I18n methods, the i18n_tools gem works by scanning your source code.

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request