Part of professional think students easier learn different languages at beginning classes than high school. And now I discuss about pluses and minuses this theory.
It's very good plan, because if children started studying many languages at a young age, he get useful information better than teenagers live. The child's quickly processed new things and remembers very well. Studying other languages in parallel with his national, he will be fluent in different speech as well as with his native language.
But have negative effects. For example it's was hard. The child may have a stressful situation, and he can damage his health. Aslo he may get confused. And then not know your own well and then also a foreign language.
So in conclusion I want to say learned different languages at secondary school is right. Because in this period he learn language which need him