select_available_locales search doesn't respect rails enforce_available_locales

[yf6]

I'm on Spree 2.4.9 and rails 4.1.11, it appears that rails enforce_available_locales is not working well with the i18n select_available_locales search box.

The select tag gathers all supported locales by spree and list them in the local presentation, but doing so triggers a Spree.t call of each locale. But when I have enforce_available_locales set to true in my rails application, and allow only a subset of what spree supports, rails i18n throws an invalid locale error when the t method is called on the other locales.

I think spree i18n needs to respect rails enforce_available_locales, and maybe only show the list of available locale by rails in the select tag?

Here is the detailed error message:

ActionView::Template::Error (:sk is not a valid locale):
    69: 
    70:   <div class="field">
    71:     <label for="available_locales_"><%= Spree.t(:'i18n.available_locales') %></label>
    72:     <%= select_available_locales %>
    73:   </div>
    74: </fieldset>
    75: 
  vendor/bundle/ruby/2.0/gems/i18n-0.7.0/lib/i18n.rb:284:in `enforce_available_locales!'
  vendor/bundle/ruby/2.0/gems/i18n-0.7.0/lib/i18n.rb:151:in `translate'
  vendor/bundle/ruby/2.0/gems/actionview-4.1.11/lib/action_view/helpers/translation_helper.rb:68:in `translate'
  vendor/bundle/ruby/2.0/gems/spree_core-2.4.8/lib/spree/i18n.rb:18:in `translate'
  vendor/bundle/ruby/2.0/bundler/gems/spree_i18n-fe65f6b87f1d/app/helpers/spree_i18n/locale_helper.rb:31:in `locale_presentation'
  vendor/bundle/ruby/2.0/bundler/gems/spree_i18n-fe65f6b87f1d/app/helpers/spree_i18n/locale_helper.rb:26:in `block in all_locales_options'
  vendor/bundle/ruby/2.0/bundler/gems/spree_i18n-fe65f6b87f1d/app/helpers/spree_i18n/locale_helper.rb:26:in `map'
  vendor/bundle/ruby/2.0/bundler/gems/spree_i18n-fe65f6b87f1d/app/helpers/spree_i18n/locale_helper.rb:26:in `all_locales_options'
  vendor/bundle/ruby/2.0/bundler/gems/spree_i18n-fe65f6b87f1d/app/helpers/spree_i18n/locale_helper.rb:8:in `select_available_locales'