Learning a second language is great for traveling and getting a better paying job, but it can also make your brain healthier. This video from the TED-Ed YouTube channel explains the different type of multilingual speakers and how speaking multiple languages helps your brain stay healthy. Generally, the earlier a child can start learning a language, the better, but even adults who learn a second language can benefit from it. Your brain can show more activity and a higher density of gray matter that contains your brains neurons and synapses. It’s also possible that knowing and speaking a second language on a regular basis can help delay the onset of Alzheimer’s and dementia.