Now I have some (a little) experience not in interpretation but in translation. I had to translate an e-mail for one company. omg. I understood everything while reading, but when sat in front of the computer I got very confused. I spent 1 hour and a half to type it and make it sound neat. And it was a small letter... Yesterday I could breathe with relief but today they've called me that they have a new e-mail...
But still, I adore English.