Drupal 7: How do I translate the content of a checkbox I created? I have a multilinugual site, content translation works. Now I added a content type and used the checkboxes/dario buttons field for a new field. How can I translate the content of such a field.

Let's say I put in gender male|Male female|Female now I have spanish and want the spanish text to be shown. How do I do that?

I found someone suggesting I had to use php fields, but I don't even see a php field there, although the module works in other places, besides even though I am a programmer this seems pretty complicated for the task.
You've got content translation enabled but have you installed and enabled the entity translation module as well? In Drupal 7, you need this to be able to translate each field / entity. I've used this guide (also referred from the entity translation project page) as a good step-by-step process on how to set this up.