svenfuchs/rails-i18n — pull request #452 by middagj (2014-05-19 10:40:31+00:00)
Title: Added es-US locale

Our site is also offered in es-US, but the currency sign defaults to €, due to a missing locale. I think Spanish is spoken by enough US citizens as primary language such that a own locale is justified. I copied it from Mexican Spanish and it has the same translations as the general Latin American Spanish (es-419).