Aquinas, I will be watching this post with interest. I am fluent in 3 languages and dh in 2. Dh and I talk to each other and dd in one of our native languages. However, dd is still far from being fluent in that language. After 4 years of immersion, she is at the level of a native 1.5 year old. The reason, IMO, is that English is a far simpler language to learn- the grammar rules are simpler. Plus she knows that everyone speaks English and not many speak the other language. So what is the incentive? The only hope I have is that when my siblings and I were young, we spoke in a language different from my parents but as adults, we ended up learning both languages plus English. So it will click someday. All the best and sounds like you have a fun plan. Maybe French cartoons and songs might pique his interest as well.
