In Learning Languages: Meryn Stol voted up this answer. Ligia Fleckenstein If you live in the United States, right now, the best language for your kids to learn is Spanish. But I agree with Mikael, if either you or your spouse have a foreign background, it would be a great reason for your kids to learn that language to be able to communicate well with that side of the family. See question on Quora - Meryn Stol