"Donna Metler" wrote in
:

Anyone else's child do this?

yes. my now 8 year old has done the 'Texas twang' thing since he was
around 4 or 5, only occaisionally & only on some dipthongs, like your
daughter. he also has a 'robot' like method of talking, & frequently
uses a babytalk whine/inflection, both of which drive me crazy
(particularly because both are linked with his echolalia, so it's the
same phrase over & over & over & over...).
lee