A few weeks ago, via various sources, I came across a study that said already at birth, babies cry in their mother’s language (their mother being the one person they will always hear, once they can hear). The study compared German and French babies in particular since the difference is so obvious in the spoken language.
I dug out some links to that study which was carried out at Würzburg University because after all, this is one aspect of what our “baby project” is all about.

Daily Mail Reuters

But in the end, we’ll have to judge by our own ears. (Or maybe I’ll post some sound samples here. ;-))