"Crosslinguistic studies have shown that young children have preferences for sounds and sound structures, which can be correlated with certain characteristics of the respective target language. For instance, at the babbling stage Japanese children produce more back vowels than English, French, Chinese, or Arabic children..." Source: "Early Phonological Acquisition of German and Spanish: A Reinterpretation of the Continuity Issue Within the Principles and parameters Model", by Conxita Lleo, Michael Prinz, Christliebe El mogharbel (University of Hamburg) and Antonio Maldonado (Universidad Autonoma de Madrid) in "Children's Language, Volumn 9", editied by Carolyn E. Johnson and John H.V. Gilbert.