Really? Do you have a source for that.
It's something that's been mentioned a few times, although not sealed in stone.
Following the release of the 2.4 Beta, the patch notes revealed that,
“The radio chatter system works differently under the hood now, enabling us to do cool magic chatter based things in the future.”
This follows on from previous comments back in 2015 where Frontier said they would like to make changes to NPC Communications,
“NPC comms is still on the cards {…} The tier 2 NPCs is likely to change, but we need to see how other factors like NPC comms fit in and what we can take from there.”
[…]
“We also want to look at chatter providing hints and clues to hidden or secretive events like treasure hunts.”
During a Reddit AMA when asked about the use of voices for NPC ships, Jim Croft head of audio commented,
“It’s a huge undertaking to avoid repetition. I would like to use speech synthesis and do it procedurally.”