Even if they are similar kind of careers, translating and interpreting are not exactly the same.
Depending on the country, it's also possible to study or to professionally specialize only as a translator or only as a freelancer.
...but it's a little bit like thinking that a cardiologist has the same background than a orthopaedist just because both are physicians, or that a composer has the same working routine than a conductor, just because both work in the music sector.
Do you know further movies?
German version of this post - Deutsche Version