I'm asking because I wonder if it's more normal than I think, or it's just that our dog is strange? He has got vocal cords that he can use, because we have the occasional weird noise, so I'm not worried on that score. He's our fourth rescue sighthound, and he was eight when we adopted him in 2019. He was a very successful racer, later used for breeding; and then he was handed to a greyhound rescue site.
For months he was mute. When we'd had him a few months and he finally made some kind of weird sound I was so pleased. From time to time he'll make a noise that I try to interprete, but barking isn't part of his vocabulary. I was used to knowing what my dogs were trying to indicate because of the noises they make; can't do this with him.
I have picked up on one sound, which I interprete as 'Woe is me, I'm not getting another breakfast just after my first breakfast'; 'Woe is me, you're not getting my tea, mum, even though I'm an hour too early'. So he can say, 'Woe is me', but not bark to say, 'I think that's an intruder mum, you need to protect me'.