Would you encourage your children to learn a second language?

Tweet

A friend of mine has two children, one boy and a girl. Both of them can speak Japanese and English fluently. Since their mother is Japanese. Now, my friend want to encourage them to speak Spanish, since both children learn some from school, and now they speak some Spanish when they watch the Spanish channels. I think that is a good idea. It would be easier for the children to learn a second language while they are still little. They have great memory, and plus some daily practice, they will manipulate the language as they grow up. Would you also encourage your little child to learn a foreign language too?