Obviously you can find tons of examples of words that are different in different languages. I probably confused the situation by bringing Japanese in. My son is Japanese so we talk in Japanese to a baby. I wasn't trying to compare languages. I was trying to talk about baby words.

Yeah it falls apart at any level of complexity.

I just think there are certain cases in often used words and words that babies say or hear a lot at first. Like the mama/haha/papa/baba words. I'm talking about a 'language' in the same way the article talks about an animal language. Like a few often used words linked to emotional states.

I don't mind if you disagree I just happen to believe oishii may be one of these words.