Indeed. Here’s how Rev. Austriaco puts it:
"If the biological capacity for language presupposes the acquisition of a package of pro-language mutations in the human genome, as biologists assume, then I can imagine a scenario where two anatomically modern humans, each with a subset of these pro-language genetic mutations, mate and conceive children. Marriage partners are often exchanged between groups of hunter-gatherers dispersed over larger areas of land so I can imagine that the two mates would have come from two somewhat distinct but related gene pools each carrying distinctive language-related genes.
Their children would have inherited the complete package of pro-language genes, bringing together the genetic advantages of each of their parents, and thus, would have acquired a novel capacity for language. With God’s infusion of the human soul, they would be the first instances of behaviorally modern human infants surrounded by a tribe of closely related anatomically modern relatives who would not have full language capacity."
Rev. Austriaco distinguishes between anatomically modern humans (AMH) and behaviorally modern humans. The original AMHs would number, at minimum, in the thousands but the latter, according to Rev. Austriaco, indeed could have been as few as two.