I’m pretty sure I change my pitch depending on which language I’m speaking. Scandinavian languages go pretty low, English and German is somewhere in the middle, and in French and Italian I go pretty high out of some desperate hope that it will make me easier to understand. I’m not sure it helps much.

Intonation of course changes, though probably not enough. And I’m pretty sure someone from a village close to home could recognize traces of my accent no matter which language I’m trying to speak.