On Mars I imagine you would hear a very mushy drunken sounding
G-G E-E T-T O-O F-F M-M Y-Y L-L A-A-A W-W N-N-N!!!
In worlds where the speed of sound is higher than on earth, people would sound like mickey mouse and an observed conversation would rather like early Chinese martial arts movies, where the lips continue to move after the sound is uttered.
