Frangiblepani

People used to say you shouldn't teach an infant more than one language at once, meaning the child should master one language first, then add others. Has that been debunked?

If so, is there any upper limit on how many languages an infant can/should learn, before it becomes a detriment?

Sorry I don't have anything about language disorders, it's not something I've thought about, much.

Also, advanced math doesn't need to be on a kid friendly site - most little kids aren't going to get it.

Thanks for the clarification. I can see now that they're totally different things. I always used to ignorantly lump it all together under "can't talk properly."

Now that I think about it, a child of a family I know speaks in a way that sounds like someone trying to clear phlegm. He says S sounds like shk. It improved as he got older but it's still there. I assumed it would go away eventually.

Are language disorders usually a physical thing, or are they the result of habits or something else?

Like TV chef Jamie Oliver seems to have a lisp, and when I watch him on TV, it looks like he has a fat tongue. Any idea what's going on there?

I've met kids who spoke multiple languages from birth or very early, but I'm wondering if it comes at a cost. Like maybe their hand eye coordination or something.