Spanish to English

Hi,
I am tying to translate South or Central American Spanish to English. Under the review tab, the language translate feature only has Spanish from Spain in the pull down box.

I had this working in the past, but the South America Spanish option is gone. I have checked the options link and its not there either.

Does anyone know how to add the pair of South America Spanish to English.

I have also added the language under settings.

Thanks