Shows missing I18n keys in Rails applications. It parses all view files searching for t helper invocation. haml, erb and slim (without Translator plugin) views are supported.
Add the following line to your Gemfile:
gem 'missing_translations'bundle exec rake missing_translations
Example output in one project of mine:
% rake missing_translations
Searching in app/views/admin/app_versions/nodes.html.erb
...
Searching in app/views/layouts/application.html.slim
Missing translations
en.logo.alt
en.layouts.application.welcome.message