Of course young children and babies can acquire English or whatever language.
According to great H. D. Brown ALSO adults can acquire and not just learn the language.
I think I can see this in my adult students, but I’m not sure anyway.
I speak a lot and I make them participate a lot too. And they do, with many errors and mistakes, but we have communication amongst us, which is the main goal.
After their contributions I correct one or two grammar mistakes or errors from them though: grammar is so important, it’s like the skeleton of language. / Photo from: the martian www europapress es. The pic here is just an illustration from The Martian movie I assume.