I've got some troubles with the couple Rails 3.0.1, Ruby 1.9.2 and my website localization. The problem is quite simple, i've got something like that in a view : f.input :zip_code, :label => I18n.t('labels.zip_code') and a es.yml file : es: labels: zip_code: "Este código postal no es valido." There are no troubles with the en.yml file (it's pure ASCII) but when the website is set with i18n.locale