Baby talk
My little sister (not so little now nearly 30 years on) was born fairly late on compared to the rest of her siblings, consequently she became a bit of a centre of our lives in a "cutesy things that babies do" kinda way. Her main lasting influence is words which she couldn't say when she started to learn to talk which we still use to this day as perfectly normal English.

For instance:

She couldn't pronounce her own name, "Marion" was pronounced as "Mamoo", which we shortened to "Moo" and it stuck

Similarly big sis "Yvonne" became "Ott"
Glasses=Gakkies (Gaks for short)
Grandad=Gangank
Dungarees=Eegs

These are the ones that spring to mind, I'll stick more down as I remember. Not hilarious I know, but those with kids will understand.
(tinypod will never learn. Ever., Fri 21 Nov 2008, 8:47, 3 replies)

My wife's family is very much the same..
But they add the childs voice too, which I feel is slightly strange.

Some things just stick..and they're fun to remember, but to hear grown ups talk like children is f*cked up.

When we have kids, I would like them to know the queens english..otherwise when they go to school, they'll be talking like a retard, and get bullied everyday.

My mother in law asks "Do you want some Crips"? Which means crisps.. Until I pointed out that the "Crips" are one of the most notorious gangs in America.
(TheRiddler Hmmmmm... I concur., Fri 21 Nov 2008, 9:01, closed)

My nephew couldn't pronounce my sister's name Amber.
He always called her Baba.


Guess what I always call her now?

She hates it.
( girlinthehole, Fri 21 Nov 2008, 9:41, closed)

My brother
Couldn't pronounce the word 'vinegar', calling it 'vigalar'. He left home a long time ago but me and the Mother still refer to it that way.
(missc, Fri 21 Nov 2008, 17:01, closed)