Oscar Wong/Getty Images I've been studying Chinese — one of the hardest languages for English speakers to learn — for over a decade Though you can't learn Chinese with apps alone, technology can be a great tool for language learning. These are the apps that helped me become fluent in Mandarin Chinese. I've been studying Mandarin Chinese for about a decade, and even after many classes, living in Beijing, and countless hours of studying and practicing, the learning process can still be painfully demanding. This might be because Chinese is one of the hardest languages in the world for English...