You first: Do you have children - or rather toddlers?
My six-year-old son didn't speak that well when he was 22 months old. I remember well. My 14-year-old daughter spoke better than that - in three languages (for which reason she was asked to participate in a long-term study of multilingual children).
That a 22-month-old child might speak as quoted here is perfectly consistent with my personal experience - especially since we don't know the details (is the child suffering from a learning disability, etc.?).
Regards,
OK Second attempt to make a point you seem to want to miss...
I have children, 4 of them. The never talked that way. It sounds made up. It does not sound like ‘normal’ babytalk.
Doesn’t it to you? Did any of your child ever refer to themselves in the third-person? or say “Me happy too”
That’s more like tarzan and jane english.
My point is about the mother- not the children - it sounds like the mother is making it up, to me.