> People should learn two programming languages at the same time

I find this completely impractical. Programming is hard for people to learn. They're juggling all sorts of new concepts and ideas. It's hard for them to remember the terminology, the data structures, the ways in which functions work, or even when and if they should use functions. Teaching them two languages simultaneously would be far more confusing than helpful.

I'm all in favor of learning different approaches and different languages. But for someone without any background to learn two languages simultaneously would be making it more difficult, not less.