Translation of plump in German

So by age twelve, I had decided that I wanted to learn English and I was studying for the United States TOEFL at age twenty. Being bilingual practically from birth, makes speaking languages very easy for me.
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.
I see that you want to improve your English. If you understand Spanish, we could talk on ICQ. If you're online, we can chat there. Can you please give me your email and other contact details.