devise-i18n

Devise "is a flexible authentication solution for Rails based on Warden". Internationalization (aka i18n) is a "means of adapting computer software to different languages, regional differences and technical requirements of a target market".

Devise supports i18n in controllers, models, and in other areas, but it does not have support for internationalized views. devise-i18n adds this support. Devise also does not include the actual translations. devise-i18n does this too.

Installation

Add to your Gemfile:

gem 'devise-i18n'

Assuming you have not previously generated Devise's views into your project, that's all you need to do. If you have previously done this, you will need to regenerate your views (see the next section) and then reapply whatever customizations that made you do this in the first place.

NOTE: If you have the simple_form gem in your Gemfile, this command will generate the corresponding views using the simple_form form builder.

Customizing views

The devise:i18n:views generator will copy all devise-i18n's views to your application so that you can modify the files as you wish.

rails g devise:i18n:views

You should only do this if you really need to, though, because doing this will make it so that you won't get the updated views should they change in a future version of devise-i18n. To "uncustomize" the views, just delete them, and your app will go back to grabbing devise-i18n's default views.

Scoped views

If you need to use scoped views (for example, if you have different ones for users and admins), you can include the scope in this command.

rails g devise:i18n:views user

You will additionally need to generate the translations into your app per the following section and then add keys in each file for the scope you are using.

Customizing translations

If, for whatever reason, you want to change devise-i18n's translations, you can generate the locale file into your project with

rails g devise:i18n:locale it

which will generate config/locales/devise.views.it.yml. If you're doing this to add a missing translation or to improve an existing one, it'd be nice if you could share your suggestions with us!

Contributing translations to devise-i18n

Edit the translations directly on the devise-i18n project on Locale. That's it! The maintainer will periodically pull translations from the Locale project and push to Github.

Alternately, you can create a pull request on GitHub.

In general, the tone of translations should be friendly, polite, and succinct. Certain languages (including Japanese and Korean) should use a more formal tone which is the standard for customer messages in those languages.