you can see that the main difference is in how the information is presented - orally in interpretation and written in translation. This might seem like a subtle distinction, but if you consider your own language skills, the odds are that your ability to read/write and listen/speak are not identical - you are probably more skilled at one pair or the other. So translators are excellent writers, while interpreters have superior oral communication skills. In addition, spoken language is quite different from written, which adds a further dimension to the distinction. Then there's the fact that translators work alone to produce a translation, while interpreters work with two or more people/groups to provide an interpretation on the spot during negotiations, seminars, phone conversations, etc.