Didn't think this was worth its own thread(it's definitely not worth its own thread) but whenever I thought about reptilians/argonians/etc that had actual reptilian facial features, I thought that they adapted a form of
syrinx, which allows for a fairly expansive range of vocalization... including human-like speech. The syrinx has the dual benefit of usually being able to conceal illnesses, whereas mammalian vocalization is generally hampered. It may be less of an issue in this world, but seeming ill can be a death sentence if there are others eager to exploit it -- iirc, reptilians are distrustful, and this adaptation would add to it perfectly. On top of that,, it allows for mimickry... further making trust an issue(because that could be your friends voice, or...).
Although the syrinx is observed(and observable) in modern birds only, if we're honoring our own fossil record, it's not entirely implausible (In terms of theoreticals) that modern birds and reptilians share a common ancestor that had a developed syrinx. Though, a syrinx that's appropriately sized for a reptilian would produce very baritone vocalizations. Then again, perhaps they could be host to syrinx bundles, or a split airway.
I know, I know, itza viddy o'gaym, but it's worth considering. I quite like more bestial traits for races that are distinctly nonhuman, personally, so I might have a bit of a bias. Just wanted to get this idea out there, though.