Through coos and cries, babbles and thbbbbts, babies are learning how to communicate from the earliest days of life. Language development is a magical opportunity to watch a child learn to engage with both you and the world. It also feels highly consequential, and for so many parents, it’s an incredibly stressful milestone. Watching your kid learn to talk is at once neat and frustrating and harrowing, all the more so when we realize that even the experts are often scratching their heads about how it all works. Today on ParentData, Professor Michael Frank joins to explore the question of how children learn to speak. We talk about how language develops, the difference between receptive and expressive language, whether the pandemic had a significant impact, and which language is the hardest for kids to learn (spoiler alert: it’s Danish). Subscribe to ParentData.org for free access to new articles every week on data-driven pregnancy and parenting.