I thought the same thing, I didn't see anything in the article that mentioned that learning a new language improved your brain, unless you already had a very go

I thought the same thing, I didn't see anything in the article that mentioned that learning a new language improved your brain, unless you already had a very good and connected brain to learn the language. Maybe we can infer that if you try to learn somethign which you don't have the brain capacity to learn, it will be of no use. But if you try and learn something at your level of brain capacity, it will improve your brain. Therefore, to improve your brain you need to challenge it everytime with something it's capable of solving. Sounds a lot like it's saying, just actively practice your brain.