Error admin spree_i18n

gistfile1.rb

NoMethodError in Spree/admin/overview#index

Showing /home/vagrant/local/ruby/gems/gems/spree_core-1.2.2/app/views/spree/admin/shared/_translations.html.erb where line #7 raised:

undefined method `delete_if' for "translation missing: pt-BR.date.month_names":String
Extracted source (around line #7):

4:                               :scope => 'spree.date_picker',
5:                               :default => 'yy/mm/dd'),
6:     :abbr_day_names => I18n.t(:abbr_day_names, :scope => :date),
7:     :month_names    => I18n.t(:month_names, :scope => :date).delete_if(&:blank?),
8:     :previous       => I18n.t(:previous),
9:     :next           => I18n.t(:next),
10:     :no_results     => I18n.t(:no_results),
Trace of template inclusion: /home/vagrant/local/ruby/gems/gems/spree_core-1.2.2/app/views/spree/admin/shared/_head.html.erb, /home/vagrant/local/ruby/gems/gems/spree_core-1.2.2/app/views/spree/layouts/admin.html.erb

Rails.root: /vagrant/store

Hi,

1-edit "/store/config/application.rb" add this line==> config.i18n.default_locale = :"pt-BR"
2-copy https://raw.github.com/svenfuchs/rails-i18n/master/rails/locale/pt-BR.yml to /store/config/locales/pt-BR.yml
3-restart server

It doesn't help. For example
ru.date.month_names is missing in ru.yml file from spree_i18n gem.
I did add it and got the same exception as above...