Field with specific set of values


I am writing an application to manage bills (water,gas,electricity,etc). I have a model "Bill" with a field that tells what type the Bill is, right now it is a string. And I would like to i18n the app.

The problem is that depending on the locale the type of the Bill is going in either english or any other locale. Is there a way to solve this? I am using SimpleForm for the forms.

Tiago Veloso