Yes, it can
----

At least, Wizards of the Coast seems to think so.  

In Chapter 13 of *Out of the Abyss* (p. 171), an NPC uses *minor illusion* to simulate a whole two sentences.  

There's no indication of how many turns it takes, but it must be realistic sounding, because 
>! the voice is intended to intimidate the player characters into retreating.