Kandra-in-disguise quoted WoB that said:
Q: Someone who has Breath Investiture, can they give the Breath to someone who doesn’t, solike somebody from Scadrial, or…A: Yes.Q: Would the Scadrian be able to use it.A: Yes. You have seen people from off-planet who have Breath before.Moderator: Or… perfect pitch?A: Yes. [laughter] And are making use of it in variety of ways.
From this quote and the quote from The One Who Connects If someone was given a breath, they would be able to use it.
I also agree with The One Who Connects that only Nalthians are born with breaths.
ZAS
After several more signings, I asked my other question. "Do people in the Comsere, besides Nalthis, have Breaths?"
BRANDON SANDERSON
"No." He then signed a person's books, then said "To elaborate a little more, that's not to say they don't have a life force, because they do. But if someone not from Nalthis were to suddenly gain the ability to become an Awakener, they could not use what they have to Awaken something. That's not to say that they can't receive breaths though."