Talldrink said:I dont think is that easy to change your accent on the fly like that. Unless you are constantly thinking how you are going to sound when you are talking and that would make it worse. When I was learning English, thinking too much made me say words incorrectly (i.e. Beach and B*tch, aunt and ant, etc).
You have to have a good command of the language in order for it to work. As you stated above Talldrink, you were just learning English, so naturally you had to think about what you wanted to say and could not concentrate on the accent.