Hello Nic39,
I think you'll be pleased by the island. People are very welcoming here, the climate is pleasant.
Regarding schools, the system is based on the French model. So teaching is in the French language, I hope your son will get used to it quite rapidly. Generally, there is no problem for children to integrate a class.
When are you planning to move over here ?
If you need more information; just let me know.
Elodie.