Hi, My kids (7 and 4 years old) are right now 3 lingual. They speak Polish, English and now Spanish. We are currently in Mexico. We have been here for 4 1/2 months and enrolled them in Mexican school, only Spanish. I am amazed as to how quickly they picked it up. If you want read on how we did it here is a link http://wanderlust.bajan.pl/2011/12/15/raise-multilingual-children/