You are talking about the boot loader, but even that is pretty standard. There could be hardware exploits in place, sure, but we are mostly talking about a very low margin product and the volume of data that you’d need to retrieve and process to sift out anything useful would be massive and obvious so in general I think this is mostly conspiracy level thinking. Any shenanigans is going to be done in small targeted batches if it’s done at all to try to infiltrate specific targets and reduce risk of some curious researcher or enthusiast accidentally stumbling across it and ruining it.
A baby doesn’t learn concepts by repeating words over and certainly knows what a mother is before it has any label or language to articulate the concept. The label gets associated with the concept later and is not purely by parroting and indeed excessive parroting normally indicates speech development issues.