Studying foreign language is a very difficult thing, especially when you try to let 2 or more than 2 foreign languages coexist in your mind. I have spent many many years learning English, yet I am still not satisfied with it. Then I began to learn Japanese and my head was full of Japanese words and sentences. And now when I am coming back to English and find that I can not speak as fluently as before, write as freely as before. I really admire those who understand several foreign languages. Perhaps, the ability of learning foreign languages is a gift from God...