A prevalent view in monolingual first language acquisition is that children acquire their native language. One’s first reaction is, “well, yes, how could it be otherwise?” The study of ‘heritage’ learners suggests a reconsideration of that view. Polinsky and Scontras (Polinsky & Scontras, 2019) present a fascinating review of the phenomena characterizing heritage learners and propose several underlying mechanisms to account for those phenomena. Their review encourages a broader view of language acquisition. To me it suggests that variability is the norm.