Translation of clearer in German

Sometimes you forget one word and this makes the entire sentence sound differently. That means that you need to read each email before sending it twice at least if you want to be on the safe side every time.
It certainly is one of the reasons that a student from abroad is not as good in English as people who were born in America. This is an obstacle for all students and a challenge for the educational system.
I have already written some vocabulary lists on paper and typed in some of them here at Vocabulix. The automatic system here works better than flashcards on paper. Too bad there is no software.