Which language to learn in 2025 - VocAdapt just launched!

I want to start learning a new language in 2025 and as the world shifts towards China as one of the biggest economies in the world, I bet it should be Mandarin - or prove me wrong? The good thing is regardless of which language I would choose to learn, I make the product that will help me to achieve any language goals! Check it out @ https://www.producthunt.com/posts/vocadapt