I have experienced scenarios like this many times in my career. Parents making it the entire way through their pregnancy with very little knowledge of how pregnancy and birth work. I used to find myself doing very last minute, rushed antenatal education sessions.
"It's on the onus of the parents" you may say. Yes, to a degree it is down to them to learn, but it's down to us, the system, to ensure they have access, even more so when there are communication barriers.