https://www.sussex.ac.uk/webteam/gateway/file.php?name=where...
https://www.sussex.ac.uk/webteam/gateway/file.php?name=where...
What that paper does argue is against "in the beginning, there was one language" theories, which is not the same thing at all.
Granted, the original submission goes a bit overboard. It's not "nearly every language", it's about 55% of all languages for "mama" as mother, and 55% for "papa"/"baba" as father, there's a lot of mixing m/p/b (the labial consonants) and so on. But both you, and the paper you link to, are supporting that position, essentially.
"8. Conclusion.
As the evidence shows clearly, the mama/papa words are created by parents who are eager to believe that their children are trying to talk when in fact those children are merely producing the universal babbling noises.
Since every child babbles in much the same way, parents everywhere hear the same noises, and they almost always choose to assign the same meanings to the childish noises they hear.
Again and again parents create words like mama ‘mother’, and again and again these creations pass out of the nursery into adult speech, displacing other words in the process.
As a result, we find the mama/papa words in languages all over the planet, in much the same form everywhere, and we frequently find them in the process of displacing older and more formal words, which themselves may be the greatly changed remains of earlier mama/papa words."
In the South Indian language Tulu, "ma" root word (ie., Amme) is used to refer to the father and the "pa" for mother (ie.,Appe).
Also, mama = Uncle in many Indian languages (both Dravidian and Indo-European).
It is not surprising that some culture developed it the other way around.
Edit: before you ask, yes he did know exactly what it meant. He'd point at things and say "dai", fully expecting you to bring it to him.
I think you may well be reading too much in to it. Reaching for things and uttering out of frustration if they're out of reach comes long before any useful linguistic understanding.
Do you remember how old he was? As someone with several younger siblings and newborn foster siblings, I'd guess that it was a cute coincidence (as many "first words" are).
Hungarian = anya
Kannada = ತಾಯಿ (taayi) ... "avva" sometimes colloquial.
Telugu = తల్లి (talli)
The Telugu word is the formal name (corresponding to mother on Wikipedia). Are you familiar with the language?
We'd need statistics on the frequency of the first consonant utterance, and see if it correllates with the distribution of the names given to mothers by babies.
That's intriguing, because 'amma' is the Tamil word for mother.
In modern Finnish, "mamma" is one of the words used colloquially to refer to one's grandmother (cf. "granny"). In some dialects, it can also mean simply "mother". These usages are probably loaned from Swedish where the formal words for mother and father are "mamma" and "pappa" respectively.
formal: nanay (mom), tatay (dad) or just nay or tay for short
informal: Ina (Mother), Ama (Father)
It's interesting that even the formal words are simple enough for a baby to pronounce.
FWIW, "mama" means something entirely different (formal, uncommon term for gentleman).