I've experienced something similar as a child by doing an exchange with an English family who had a kid my age when I was ten. I went 6 month in England in that

I've experienced something similar as a child by doing an exchange with an English family who had a kid my age when I was ten. I went 6 month in England in that family and went to school with the kid and he then came to France for 6 months. The first few weeks were hard of course, I was alone in a family where no one could really speak French and I could hardly speak English but I quickly learned the language and at the end of the 6 months, it was harder for me to speak French than English and I spoke both languages with a british accent (which I've lost since then unfortunately)... I enjoyed the experience so much that I did the same in Germany and in Spain (I wanted to go on and do the same in Japan during high school but my parents nixed that). Kids are really adaptable and even if it is a bit hard at the beginning I truly believe that it's broadens the mind. So, to answer some of the comments who mention it's child abuse, well from the perspective of someone who was put into a foreign environment as a child I think children are more resilient and more happy to learn and discover news culture, languages and things than you imagine.