I'm using JIRA 6.3.5 and have my user profile set to Brazilian Portuguese.

As an admin I've created custom fields with names in English and had all statuses translated into Brazilian Portuguese.

When I see an issue page I can see the status ("Situação") in Portuguese, as the following snapshot shows:

However, when I click on the View workflow" ("Ver Fluxo de Trabalho") link all statuses names are in English in the graph:

I'd expect to see them in Portuguese on the graph too.