Translation of Bergsteigen

I will put that one and the offending words. These words should not be optional, cause we need to know when a word is offending. Would it be helpful to have a counter, so you see how many words you translated?
Everything in your letter is perfect! Almost no errors and the writing style, very impressive! After this first year in England, you have also improved your vocabulary and the grammar skills.
Nevertheless, I was looking forward to the flight. Thirteen hours in the air has something exciting in itself. You can watch movies, sleep, read newspapers and rest. Normally, we always under stress.