Angular i18n locale currency pain and how to setup with rails

_head.html.slim

= javascript_include_tag I18n.locale.to_s

currency_pain.html.slim

%span.value {{ amount || 0 | currency:'$' }}
# I18n.locale => en
# => $100

# I18n.locale => pl
# => 100 $

en.coffee

#= require angular-i18n/angular-locale_en-us.js

Gemfile

gem 'rails-assets-angular-i18n', '~> 1.4.1'

pl.coffee

#= require angular-i18n/angular-locale_pl-pl.js