Five-year-old Mehdi Rahimi watches his favorite cartoons on TRT Çocuk, a Turkish channel for children that his family gets on satellite TV in their home in Fatmayi, a village just outside of Baku.

Learning a new language can enrich your life in ways you wouldn’t expect, but it still sounds intimidating, doesn’t it? Kids seem to pick up on new languages so easily, but once you’re a bit older… ...