I\'ve found that Rails allows for generic i18n of submit buttons via the following in config/locales/en.yml:
config/locales/en.yml
en: helpers: submit: cr
From the source code, it looks like you should be able to do this:
en: helpers: submit: post: create: "Upload %{model}"
where post is the name of your model. The inline docs also mention that you can do this.
post