Yeah they did. They all sounded weird but what's really weird is that they did correct voiceovers for a few of the aliens (Gluupor, Motta, and the one Hutt for the dueling ring). I guess the voice actors got tired of talking weird.
That was me who said that and yes you are correct of course you can hit A to skip and is prolly the smart decision. It'd still be nice for gameplay and storyline purposes though just to have a bit more variety.
That would be hard to implement because then you'd have to totally change the NPC's feats, powers, etc and bonuses and the like. I'd say it prolly won't happen.
I'm sorry if this has been mentioned before but could we get a bit more variety in the alien voiceovers? I mean hearing the same Huttese phrase over and over again kind of got weird. And it was awkward when for instance the alien would talk for like 10 seconds and their answer was like, "Yes". Just a thought.