Go to this link to see blog by Leena Helevaara Robertson on multi-lingualism http://blog.finnish-institute.org.uk/2016/02/hats-off-to-multilingual-families.html
She says in conclusion:
When my sons were born in London, I became very active in establishing a Finnish Saturday school for them. I wanted them to make personal relationships with other Finnish children, play in Finnish, read and write in Finnish, and connect with the Finnish community in England. Today there are 160 Finnish Schools around the world. And guess what? Other linguistic minorities do exactly the same. The whole world over. Particularly in urban areas. There are networks of Portuguese, Greek and Turkish schools around the world supported by their embassies. There are many, many others including Mandarin Chinese schools where they do much more than celebrate Chinese New Year and eat noodles.
If teachers are interested in cultures, and in multiculturalism, these are the best places to visit to see what kinds of cultural practices are transported. Best places to form connections, friendships even. The other fascinating aspect is to see how much these communities value education, including learning the school language, whilst aiming to keep their own languages alive.
Every time I visit these schools it takes my breath away to see their commitment. Hats off to them all.