A French friend, who is very concerned that her children should grow up speaking good English, is considering sending her nearly 7yo to stay with friends in the UK for a few weeks. She would live with them and go to school for that time.
We were talking about it and I said I thought that in that time she would learn plenty of playground English and learn to get by in domestic situations. But I'm not sure how much of it she would remember long-term.
Would she pick up and hold on to a good accent, for example?