How to set a field's 'translatable' property When I create a new field type in Drupal it seems to be automatically assigned a 'translatable' property and it's not always right. For example, I would expect a Long Text field type to be marked as translatable = TRUE, but for some reason it's coming in as FALSE sometimes. However, body is TRUE.

Is there a place where this property is exposed in the UI and changeable? 

I have the i18n module installed and enabled.
Entity translation exposes a checkbox which allows to set the translatable property.

It also provides a user interface to actually use field translation, there isn't much you can do with translatable fields without that module anyway.